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Undead MOAB-class Bloons: in-game calls them "zombie moab-class bloons", not "undead [...]"
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Tombstones are considered [[Boss Bloon|Boss Bloons]] for the purpose of damage bonuses and immunities, and are also affected by bonus damage against MOAB-class bloons.
Tombstones are considered [[Boss Bloon|Boss Bloons]] for the purpose of damage bonuses and immunities, and are also affected by bonus damage against MOAB-class bloons.


=== Undead MOAB-class Bloons ===
=== Zombie MOAB-class Bloons ===
Undead MOAB-Class Bloons spawned by Lych are visually dull green in appearance (resembling those resurrected by the [[Prince of Darkness (BTD6)|Prince of Darkness]]), and have green chains wrapped around themselves. They share the traits, resistances, and leak damage of their normal version, but generally have much more HP, move faster, and do not spawn children when popped. Lych is able to spawn all MOAB-class Bloons except for [[DDT (BTD6)|DDTs]] and [[BAD (BTD6)|BADs]].
Zombie MOAB-Class Bloons spawned by Lych are visually dull green in appearance (resembling those resurrected by the [[Prince of Darkness (BTD6)|Prince of Darkness]]), and have green chains wrapped around themselves. They share the traits, resistances, and leak damage of their normal version, but generally have much more HP, move faster, and do not spawn children when popped. Lych is able to spawn all MOAB-class Bloons except for [[DDT (BTD6)|DDTs]] and [[BAD (BTD6)|BADs]].


===Skulls===
===Skulls===

Revision as of 07:26, 11 May 2026

Lych
The Gravelord
Skulls 5
Theme Onslaught
Introduced Version 28.0
Description
• Gravelord Lych drains buffs from your Monkeys and has regenerative properties.
• Lych regularly summons Bloon Tombs which summon MOAB-class Bloons. Destroy them asap!
• When each skull on its health bar is reached, Lych goes ethereal and Lych souls are summoned.
• When ethereal, Lych cannot be damaged until all Lych souls have been popped.
• Zombie MOAB-class Bloons do not spawn children.
• While Lych is on the map, sellback value of all Monkeys is reduced significantly.

Lych, titled The Gravelord, is a Boss Bloon in Bloons TD 6, introduced in version 28.0. It is the second boss introduced to the game and the first one that isn't returning from a previous game in the series.

Lych constantly regenerates health and periodically casts a shockwave that removes certain kinds of buffs from towers, briefly stunning them. It also reduces the sellback of all towers while in play, and constantly spawns Tombstones that summon empowered undead MOAB-class Bloons along the track. Whenever its health reaches a skull, it enters an ethereal and invulnerable state, and spawns multiple Lych-souls that must be destroyed in order to render it vulnerable again.

Mechanics

General

Lych has the Regrow trait, causing it to heal for 1.5% of its maximum HP every 9 seconds, increased by 0.3% per Skull Lych has lost. Lych's Regrow property can be blocked or removed by any attacks that normally block or remove Regrow.

While on the field, all towers have their base sellback rate reduced to 35% of their original price (ie. half of the default 70%).

Buff absorbing

Every 12 seconds, Lych emits an aura that absorbs certain kinds of buffs from towers within 100 distance units, then restores its Regrow trait if it was previously removed, with a 3 second delay before it begins healing Lych again. It cannot trigger this ability while in its ethereal state, but the timer continues while it is ethereal, so it will activate immediately upon returning to normal if it's ready. Every tower that has a buff absorbed is stunned for 5 seconds in addition to losing the buff.

For the most part, Lych can only absorb temporary buffs, such as Berserker Brew, Overclock, and Call to Arms, while ignoring passive buffs such as Jungle Drums, Shinobi Tactics, and Carrier Flagship. Additionally, it cannot steal buffs provided by the following:

Note that there are some buffs that do not have icons that Lych is able to absorb, such as Turbo Charge's attack speed buff, Emergency Unlock's swivel speed buff, and Smart Spikes's attack speed buff at the start of each round. It can also steal Permanent Brew and Ultraboost buffs, despite them being permanent.

Icon Source(s) Absorbable? Notes
Super Monkey Fan Club ability / Plasma Monkey Fan Club ability Yes Transformed Dart Monkeys will remain visually transformed after the buff is drained, but lose their stat changes.
Turbo Charge ability / Perma Charge ability Yes
Glaive Dominus passive effect No
Glaive Dominus Overcharge ability Yes
Crucible of Steel and Flame Maelstrom ability No
Absolute Zero ability Yes
Deadeye Take Aim ability Yes
Bounty Hunter Take Aim ability Yes
Wanderer No
Nomad passive effect Yes
Elite Sniper No
Elite Defender life loss ability Yes
Bloontonium Reactor No
Energizer / Nautic Siege Core No
Sub Commander No
Nautic Siege Core No
Carrier Flagship / Navarch of the Seas No
Favored Trades / Navarch of the Seas No Navarch of the Seas does not display the icon.
Trade Empire / Navarch of the Seas No
Artillery Battery ability Yes
Pop and Awe No
Prince of Darkness No
Sun Temple No
True Sun God No
VTSG No
Shinobi Tactics No
Grand Saboteur ability No
Ascended Shadow No
Acidic Mixture Dip Yes
Berserker Brew Yes
Stronger Stimulant Yes
Permanent Brew Yes
Transforming Tonic Yes
Total Transformation Yes
Jungle's Bounty No
Poplust No
Root of all Nature No
Root of all Nature Primordial Wrath ability No
Abyss Dweller / Abyssal Warrior / Lord of the Abyss No
Echosense Network No
The Final Harmonic No
Banana Central No
Central Market No
Smart Spikes passive effect Yes
Mega Massive Munitions Factory Controlled Burst ability Yes
Monkey Village No
Jungle Drums No
Primary Training No
Primary Mentoring No
Primary Expertise No
Radar Scanner No
Monkey Intelligence Bureau No
Call to Arms Yes
Homeland Defense Yes
Monkey Business No
Monkey Commerce No
Monkey Town No
Monkey City No
Cleansing Foam passive effect Yes
Overclock Yes
Ultraboost Yes
Master Builder passive effect No
Master Builder Power Glove ability Yes
Beast Handler No
Come On Everybody! No
Emergency Unlock ability Yes
Paragon of Power No

Tombstones

10 seconds after appearing and every 18 seconds afterwards, Lych spawns a Tombstone 50 units behind its position. 3 seconds after being created and every 9 seconds afterwards, the Tombstone will spawn 1 undead MOAB-class Bloon based on the current tier. As the Tombstone summons Bloons, it will gradually increase the strength of the spawned Bloon; if not destroyed by the time it spawns for the seventh time, it will self destruct and spawn a large group of the highest tier Bloon it has available. In addition, Tombstones reduce the pierce of attacks that hit them by 99,999, and have the highest priority bracket for strong targeting, meaning all towers that target strong will target them before anything else.

Tombstones are considered Boss Bloons for the purpose of damage bonuses and immunities, and are also affected by bonus damage against MOAB-class bloons.

Zombie MOAB-class Bloons

Zombie MOAB-Class Bloons spawned by Lych are visually dull green in appearance (resembling those resurrected by the Prince of Darkness), and have green chains wrapped around themselves. They share the traits, resistances, and leak damage of their normal version, but generally have much more HP, move faster, and do not spawn children when popped. Lych is able to spawn all MOAB-class Bloons except for DDTs and BADs.

Skulls

Main article: Lych-soul

Every time a skull on its health bar is reached, Lych summons a number of Lych-souls at fixed points on the track, then enters an ethereal state. The Lych-soul is a smaller and faster version of Lych that spawns an Undead MOAB on its position every 9 seconds, and renders Lych ethereal as long as any one is still alive. It has most properties of a Boss Bloon: it instantly defeats the player if it leaks, it is immune to insta-kill abilities and attacks, and is affected by extra Boss damage from towers that have it. It is immune to most slowing or stunning effects, but is affected by Paragon-tier impairment, such as the Glaive Dominus. The total HP of all active Lych-souls will be displayed by an overlay on Lych's health bar.

While ethereal, Lych cannot be targeted nor take damage, but has its movement speed reduced by 50% and cannot regenerate health. It will immediately stop being ethereal as soon as all Lych-souls are popped.

Normal Lych spawns 3 Lych-souls at 12.5%, 47.5%, and 72.5% along the length of the track, with a random variance of 2.5%. Elite Lych spawns 2 more at 32.5% and 62.5%, for a total of 5.

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The editor who added this notice elaborates: May need correction or further elaboration

In Boss Rush, Lych has Regrow properties, and buff-absorbing mechanics, as well as passively reducing sellback by 35%. Lych moves at a speed value of about 2 (0.08× Red Bloon speed), reduced by 50% while ethereal. Every time Lych pops, it spawns a tombstone at its current location, which spawns Zombie MOABs regularly, increased to Zombie BFBs and Zombie ZOMGs at higher tiers. Every 10 pops, Lych will become ethereal and spawn three Lych-souls (five Lych-souls at 50+ pops).

Stats

Normal

Base health
Tier 1-player 2-player 3-player 4-player
1 14,000 16,800 19,600 22,400
2 52,500 63,000 73,500 84,000
3 220,000 264,000 308,000 352,000
4 525,000 630,000 735,000 840,000
5 2,100,000 2,520,000 2,940,000 3,360,000
Speed
Tier Base speed Red Bloon speed
1 2 0.08×
2 2.05 0.082×
3 2.1 0.084×
4 2.15 0.086×
5 2.2 0.088×
Tombstone
Tier Health 1st/2nd Spawn 3rd/4th Spawn 5th/6th Spawn Final Spawn Speed Increase
1 1,120 MOAB MOAB MOAB MOAB ×3
2 4,200 MOAB MOAB BFB BFB ×4
3 17,600 MOAB BFB BFB BFB ×5
4 42,000 BFB ZOMG ZOMG ZOMG ×5
5 168,000 BFB ZOMG ZOMG ZOMG ×7
Summoned Blimps
Tier Health
Undead MOAB Undead BFB Undead ZOMG Lych-soul
1 100 350 2,000 1,000
2 200 700 4,000 2,500
3 400 1,400 8,000 5,000
4 600 2,100 12,000 12,500
5 900 3,150 18,000 45,000

Elite

Base health
Tier 1-player 2-player 3-player 4-player
1 30,000 36,000 42,000 48,000
2 180,000 216,000 252,000 288,000
3 1,100,000 1,320,000 1,540,000 1,760,000
4 4,800,000 5,760,000 6,720,000 7,680,000
5 24,000,000 28,800,000 33,600,000 38,400,000
Speed
Tier Base speed Red Bloon speed
1 2.4 0.096×
2 2.5 0.1×
3 2.7 0.108×
4 2.8 0.112×
5 2.9 0.116×
Tombstone
Tier Health 1st/2nd Spawn 3rd/4th Spawn 5th/6th Spawn Final Spawn Speed Increase
1 1,600 MOAB MOAB MOAB MOAB ×5 2.1×
2 4,500 MOAB BFB BFB BFB ×5 2.2×
3 10,000 MOAB BFB ZOMG ZOMG ×5 2.3×
4 120,000 BFB ZOMG ZOMG ZOMG ×5 2.8×
5 500,000 ZOMG ZOMG ZOMG ZOMG ×5
Summoned Blimps
Tier Health
Undead MOAB Undead BFB Undead ZOMG Lych-soul
1 300 700 4,000 1,600
2 600 1,500 5,000 5,600
3 800 3,000 12,000 25,000
4 1,500 7,500 25,000 100,000
5 4,000 8,000 80,000 485,000

Round changes

When facing Lych, several rounds are changed from the standard roundset.

Round Change
40 MOAB replaced with 6 Ceramic Bloons
60 BFB replaced with 6 MOABs
80 ZOMG replaced with 6 BFBs
100 BAD replaced with 4 ZOMGs and 6 DDTs

Strategy

Old Timey MOAB-class Bloons icon This article or section is outdated and needs to be updated to reflect recent updates or newly available information. You can help out by editing this article.
The editor who added this notice elaborates: v54 rework details
For more in-depth strategies, see Strategy:Lych.

Lych is a boss that punishes the player from relying on buffs for their towers, but is important to remember that Lych does not steal all the buffs that towers can receive and has a limited range of 100 units, so by knowing which buffs can or can't be stolen and placing your buffed towers far away from Lych are useful ways to play around its mechanics.

Because of Lych's Regen property allowing it to potentially recover large amounts of health, cheap options to constantly strip its Regen, such as Heart of Oak and Cleansing Foam, are valuable to distribute across the map to ensure it never gets to heal. This same trait make the Root of all Nature a highly effective Paragon to use against it, as it deals significantly more damage to Regen Bloons.

Common options for low tier Lych are towers that can deal with the Boss, its soul and the resurrected MOABs at the same time like Sticky Bomb / Master Bomber, M.A.D and Carpet of Spikes. Defenses that are more centralized in a single place of the map like Overdrive or Avatar of Wrath are less effective against Lych due its speed and the ethereal phase specially in multi-lane maps. If additional defense against the resurrected MOABs are needed, the best option is to add towers that can stall them from any position in the map like MOAB Shove, and Maim MOAB and let them or other towers deal with them before they leak. Insta-kills like Pirate Lord are also useful in this situation, but be careful of slower ones like Ezili's MOAB Hex, as the bloons might leak before they are defeated.

Tiers 3 to 5 can be handled by Paragons and other expensive towers, those are also likely able to deal with the soul and the resurrected MOABs, provided they are still on range. Because of its ability to spawn Lych-souls across the entire track, is important to have enough DPS along the track to destroy them, not mattering where they spawn, towers that can quickly stall them and/or have backup towers such as Perma-Spike under a MIB Village.

Permanent Brew, Call to Arms and Homeland Defense are common towers that are used against Bosses, but they should not be used rashly against Lych as their buffs will only be purged. Also be wary of farms that are under Overclock or Ultraboost effects.

Update history

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  • Buff Lych-soul benefits from Freeplay scaling (bug)
  • Nerf Lych-soul no longer benefits from freeplay scaling (bug fix)
We feel like the T3 Lych health/difficulty sticks out as a larger obstacle compared to other bosses, and other tiers of Lych, so we are lowering the multiple T3 health values
— Update notes
  • Nerf Normal tier 3: Health reduced ― 245,000 → 220,000
  • Nerf Normal tier 3 Lych-soul: Health reduced ― 7900 → 7000
  • Nerf Elite tier 3: Health reduced ― 1,200,000 → 1,100,000
  • Nerf Elite tier 3 Lych-soul: Health reduced ― 27,000 → 25,000
  • Buff Bosses on spawn will now clear the map of all existing projectiles
  • Nerf Lych-soul can now be stunned and slowed by Paragons
  • Buff Lych now triggers the 'buff drain' attack immediately on spawn
  • Buff Resolved an issue where some 1 shot effects could destroy the Lych Soul (bug fix)
  • Change Resolved some issues with save loading not always correctly loading back on Lych (bug fix)
  • Nerf Damage counters should count again for attacks against Bloonarius spawns & Lych Zombie Bloons (bug fix)
Lych’s speed is being reduced across the board, also into a smoother increase over time, as this Boss has been very punishing without giving much time to deal with it
— Update notes
  • Nerf Normal boss speed decreased at all tiers
    • Tier 1 ― 2.3 units/s → 2.1 units/s
    • Tier 2 ― 2.3 units/s → 2.2 units/s
    • Tier 3 ― 2.5 units/s → 2.4 units/s
    • Tier 4 ― 2.7 units/s → 2.5 units/s
    • Tier 5 ― 2.7 units/s → 2.6 units/s
  • Nerf Elite boss speed decreased at all tiers
    • Tier 1 ― 2.5 units/s → 2.4 units/s
    • Tier 2 ― 2.7 units/s → 2.5 units/s
    • Tier 3 ― 2.9 units/s → 2.7 units/s
    • Tier 4 ― 3.0 units/s → 2.8 units/s
    • Tier 5 ― 3.1 units/s → 2.9 units/s
  • Nerf Lych-soul: Speed reduced ― 25 units/s → 23 units/s
  • Buff Lych-soul: Can no longer be slowed down by certain towers (bug fix)
  • Neutral Lych-soul: Should now be correctly affected by Boss Challenge rule modifiers (bug fix)
  • Major rework to Lych's mechanics:
    • Neutral It now has the Regrow property, and will regenerate some health every 9s.
      • Note: An icon representing when Lych has the Regrow property active will now appear at the bottom left of its health bar
    • Neutral Tower selling: No longer heals Lych, but the boss now reduces sellback value of all towers in the map by -35%
    • Neutral Buff stealing: No longer heals Lych, but now restores its Regrow property if removed
    • Neutral Resurrected MOABs: No longer revives MOABs when a skull is triggered, but now Lych will periodcally create tombstones in its current position that spawn Zombie MOABs over time if not destroyed
  • Nerf Normal boss speed decreased at all tiers
    • Tier 1 ― 2.1 units/s → 2 units/s
    • Tier 2 ― 2.2 units/s → 2.05 units/s
    • Tier 3 ― 2.4 units/s → 2.1 units/s
    • Tier 4 ― 2.5 units/s → 2.15 units/s
    • Tier 5 ― 2.6 units/s → 2.2 units/s
  • Nerf Number of skulls in Elite mode decreased ― 7 → 5
  • Added to the following game modes: Boss Rush and Rogue Legends
  • Updated description from the Boss Challenge and Boss Bloon Event menu
  • Description changed
Before After
• Gravelord Lych drains buffs from your Monkeys, healing itself in the process.
• When each skull on its health bar is reached, Lych goes ethereal, resurrecting the empty shells of recently popped MOAB class Bloons.
• When ethereal, Lych cannot be damaged until all resurrected Bloons have been popped, including the life-draining Lych-soul Bloon.
• Resurrected MOAB class Bloons do not spawn children.
• Gravelord Lych drains buffs from your Monkeys and has regenerative properties.
• Lych regularly summons Bloon Tombs which summon MOAB-class Bloons. Destroy them asap!
• When each skull on its health bar is reached, Lych goes ethereal and Lych souls are summoned.
• When ethereal, Lych cannot be damaged until all Lych souls have been popped.
• Zombie MOAB-class Bloons do not spawn children.
• While Lych is on the map, sellback value of all Monkeys is reduced significantly.
Lych-soul
  • Major rework to the Lych-soul's mechanics:
    • Neutral When a skull is triggered it will now spawn multiple souls at different points of the track (3 for Normal, 5 for Elite)
    • Nerf No longer drains lives
    • Buff Now spawns Zombie MOABs
    • Nerf Ethereal state: Lych invulnerability window no longer has a minimum duration (6s before) and will be removed when all Lych-souls are popped
      • Note: When a skull is triggered Lych's health bar will now be covered by an another bar representing the combined health of the Lych-souls
  • Nerf Health reduced:
    • Normal Tier 1 ― 1,280 → 1,000
    • Normal Tier 2 ― 3,050 → 2,500
    • Normal Tier 3 ― 7,000 → 5,000
    • Normal Tier 4 ― 14,500 → 12,500
    • Normal Tier 5 ― 47,000 → 45,000
    • Elite unchanged
  • Nerf Normal Lych-soul speed reduced ― 23 units/s (0.92 RBS) → 18 units/s (0.72 RBS)
  • Nerf Now uses its Normal mode spawns in Elite mode in Rogue Legends
  • Nerf Boss Rush: Lych-soul base health reduced ― 150 → 140
  • Nerf Boss Rush: Starting cash increased ― $2,000 → $2,500
  • Nerf Boss Rush: Undead MOAB base health reduced ― 100 → 50
  • Nerf Boss Rush: Undead BFB base health reduced ― 100 → 90
  • Nerf Boss Rush: Undead ZOMG base health reduced ― 150 → 130
  • Nerf Boss Rush: Tombstone base health reduced ― 100 → 50
  • Nerf Lych-soul (Normal tier 1): Health reduced ― 1,000 → 750
  • Nerf Lych-soul (Normal tier 1): Speed reduced ― 18 units/s → 17 units/s
  • Nerf Lych-soul (Normal tier 1): Amount of spawned souls reduced ― 3 → 2
  • Nerf Lych-soul (Elite tier 1): Health reduced ― 1,600 → 1,400
  • Nerf Lych-soul (Elite tier 1): Speed reduced ― 23 units/s → 21units/s
  • Nerf Undead MOAB: Leak damage decreased ― 200 lives → 70 lives
  • Nerf Undead MOAB: Speed reduced ― 25 units/s → 20 units/s
  • Fixed an issue with skull damage thresholds (bug fix)
  • Neutral Corrected Lych's roundset within Boss Challenge mode

Screenshots

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The editor that added this notice elaborates: More screenshots showcasing Lych sap, including of Spikeogon Controlled Burst

Assets