The Final Harmonic

The Final Harmonic

This elder can echo its irresistible tune anywhere. While devastating to Bloons, the call inspires nearby Heroes with improved range and cooldowns, and Magic Monkeys extra pierce.

Tower	Mermonkey — Path 3 — Tier 5
XP cost	52,000
Cash cost	$21,250 — Easy $25,000 — Medium $27,000 — Hard $30,000 — Impoppable

← Symphonic Resonance

The Final Harmonic is the Mermonkey's path 3 tier 5 upgrade in Bloons TD 6. It further improves the trancing attack to affect BFBs and ZOMGs, the trance's DoT (damage-over-time) trigger is improved to a maximum of 10,000 damage and can apply to BADs and Bosses, and its totem can be placed onto any valid location on screen. Trance pierce penalty against BFBs, ZOMGs, BADs, and Bosses are all +3. The trancing downtime is reduced to 3 seconds.

All Heroes and Magic Monkeys (except itself) within range of the active trance range (i.e. the totem, otherwise only this Mermonkey's own range) will receive the following buffs:

• Heroes: -15% ability cooldowns, +15% range
• Magic Monkeys: +3 pierce

Additionally, range of both itself and its totem are both increased to 38 (51.3 on water), and pierce of the trident's splashes are increased to 18.

Stats

For a complete list of Mermonkey stats, see Stats:Mermonkey (BTD6).

This data was last updated for: version 55.1

Tower
Display range 38 units Footprint radius 8 units Targeting options First Last Close Strong

Attack
Cooldown 1.2s Offset (X, Y, Z) -0.5, 3.4, 12 Targeting Depends on targeting option Targeting range 38 units
Projectile Pierce 2 Speed 200 units/s Seeking distance 80 units Seeking angle 360° Seeking rotation speed 260 °/s Lifespan 1s Radius 1 unit Splash Pierce 18 Max pierce 18 Damage 2 Damage type Shatter Lifespan 0.05s Radius 4 units Ignores blockers

Buff when in water
Range modifier ×1.35

Echosense Network
Range modifier +7.5% Max. stacks 10
Has global range

Trance totem

Tower
Display range 38 units Footprint radius 8 units

Trance attack
Cooldown 12s Offset (X, Y, Z) 0, 0, 0 Targeting First Targeting range 38 units
Ignores blockers
Projectile Pierce 12 BFB pierce penalty +3 ZOMG pierce penalty +3 DDT pierce penalty +3 BAD pierce penalty +3 MOAB-Class pierce penalty +2 Lifespan 6s Radius 38 units Rehit interval 0.3s Refresh pierce interval 0.3s Ignores blockers Removes Camo Trance Damage type Plasma Multiplier ×3 Multiplier for MOAB-Class ×1 Duration 6s Cooldown 1s

Range buff
Range modifier +15% Filters Only affects category: Heroes

Ability cooldown buff
Ability cooldown modifier -15% Filters Only affects category: Heroes

Pierce buff
Pierce bonus +3 Filters Only affects category: Magic Does not affect parent tower

1-0-5

Attack
Cooldown 1.2s → 0.96s Offset (X, Y, Z) -0.5, 3.4, 12 ↓ -0.5, 3.4, 7

Trance totem

Trance attack
Projectile Rehit interval 0.3s → 0.27s Refresh pierce interval 0.3s → 0.27s

2-0-5

Attack
Cooldown 0.96s → 0.66s
Projectile Speed 200 units/s → 300 units/s Seeking rotation speed 260 °/s → 390 °/s Lifespan 1s → 0.6667s

Trance totem

Trance attack
Projectile Rehit interval 0.27s → 0.234s Refresh pierce interval 0.27s → 0.234s Trance Multiplier ×3 → ×4.5 Multiplier for MOAB-Class ×1 → ×1.5

0-1-5

Attack
Offset (X, Y, Z) -0.5, 3.4, 12 ↓ -0.5, 3.4, 7
Projectile Pierce 2 → 3 Splash Pierce 18 → 21 Max pierce 18 → 21

Trance totem

Trance attack
Projectile Pierce 12 → 14

0-2-5

Attack
Splash Freeze Multiplier ×0 Duration 0.5s Layers 4

Costs and sell values

Note: this list does not factor in Monkey Knowledge or other discounts.

Tiers	Total cost				Sell value
	Easy	Medium	Hard	Impoppable	Easy	Medium	Hard	Impoppable
0-0-5	$30,075	$35,380	$38,210	$42,455	$21,053	$24,766	$26,747	$29,719
1-0-5	$30,200	$35,530	$38,370	$42,635	$21,140	$24,871	$26,859	$29,845
2-0-5	$30,410	$35,780	$38,640	$42,935	$21,287	$25,046	$27,048	$30,055
0-1-5	$30,245	$35,580	$38,425	$42,695	$21,172	$24,906	$26,898	$29,887
0-2-5	$30,435	$35,805	$38,670	$42,965	$21,305	$25,064	$27,069	$30,076

Strategy

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This section was last updated for: version 52.0

Final Harmonic is a fairly inexpensive but reliable method of pulling in BFBs and ZOMGs into a specific area, especially on maps that have separated simultaneous lanes, in addition to a much higher limit to its damage-over-time (DoT) detonation. With many Echosense Network buffs, its trances can cover a very wide area and have no trouble reaching all lanes on most maps. Additionally, its special buffs in trance range can assist Magic synergies that have low flat pierce (this buff is a flat pierce bonus) and Heroes that depend on abilities and/or range, including Heroes that buff other towers.

To optimize the damage-over-time detonation, its best pairing for the cost is the 5-0-2 Bloon Solver. For higher-cost towers with stronger DoTs, Super Mines is an effective choice. Avoid mixing with low-damage DoTs (e.g. Hot Shot Buccaneers), as these may trigger first, wasting the DoT detonations.

2-0-5 crosspath is typically preferred for the faster DoT detonations and faster pickup of DDTs. 0-1-5 holds more, but since the trance already has reasonable pierce and Sharper Prongs adds only a small amount, it's less effective. 0-2-5 is no different to 0-1-5 except for the larger freezing tridents.

Update history

For a complete list of Mermonkey changes, see Update history:Mermonkey (BTD6).

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Version 44.1

“

While we’re not jumping into any full on balance changes, there’s a few corrections that we wanted to make for type-fixes and other intended play. — Update notes

”

• "Weapon model glitch with crosspathing resolved"
•  Can now detonate damage over time effects on Dreadbloon (bug fix)

Version 45.0

“

Echosense Network hasn’t felt like it is doing all that it could, so we have increased the maximum number of stacks to raise the ceiling of use here as it is meant to be slow ramping with a high space & cost investment to build heavily into. [...] Same as with Abyss Dweller the middle crosspath has shown to be less useful for higher tiers, so this also sees a pierce increase to the Trance attack. — Update notes

”

•  Overall cost increased by $2,075 (due to cost changes for previous tiers)
•  Echosense: maximum stack count increased ― 5 → 10
  • Note: This means the maximum range buff has increased from +30% to +60%
•  Totem: can now be redeployed by Support Chinook
•  Totem: should save location correctly on moving platforms (bug fix)
•  Trident: projectile lifespan increased ― 0.5s → 1s
• Trance: effects now update according to attack speed changes (bug fix)

0-1-5, 0-2-5

•  Sharper Prongs now increases pierce of allure by +1

Version 47.0

•  Totems should no longer be considered overclock targets (bug fix)

Version 48.0

•  Trance: No longer has tighter orbit radius ― 20 → 30

0-1-5, 0-2-5

•  Trance: Pierce increased ― 5 → 6

Version 49.0

•  Overall cost reduced by $100 (due to cost changes for previous tiers)
•  Echosense Network now works with Mermonkeys converted by Total Transformation

Version 49.2

•  DoT detonation works correctly when crosspathed (bug fix)

Version 50.0

“

Recent changes to Symphonic Resonance caused its pierce usage to increase for far too much of a nerf, so we have increased the pierce to offset this. — Update notes

”

•  Trance: Pierce increased ― 4 → 8

0-1-5, 0-2-5

•  Trance: Pierce increased ― 6 → 10

Version 51.0

“

Mermonkey weren’t[sic] feeling they favoured their natural habitat enough, so their Water Placement bonus is getting a boost. — Update notes

”

•  Range bonus when placed in water increased ― +25% → +35%

Version 52.0

“

Last update many players felt blindsided when Brickell stopped applying her buff to Mermonkeys since there was no mention in the balance changes section. We would like to apologize for that - it was tasked internally as a bug as it was indeed unintended to work that way. We then left the issue alone for a long time, mostly due to other more pressing matters, and this issue fell through the cracks. In retrospect, it would have been better to treat this as balance rather than a simple bug fix due to how much time had passed. Reading through your feedback, we did consider just reverting the change, however the bigger issue that the feedback reinforced to us was that players considered Mermonkey to be so bad that it was only a "good" tower when used in combination with a single, water-only hero. This sort of forced synergy goes against our design intentions - namely that Mermonkey being our signature amphibious tower should be able to stand on its own without being balance-locked to an interaction with a single hero. With all that in mind, we feel Mermonkey's highest priority right now is large sweeping buffs to each of the paths, so most of the following changes are our first step towards this starting from the low tier crosspaths. — Update notes

”

•  Overall cost reduced by $200 (due to cost changes for previous tiers)
•  Trance: Pierce increased ― 8 → 10

0-1-5, 0-2-5

•  Trance: Pierce increased ― 10 → 12

Version 53.0

•  Trance: Pierce increased ― 10 → 12

0-1-5, 0-2-5

•  Trance: Pierce increased ― 12 → 14

Version 54.0

•  Overall cost increased by $25 (due to cost changes for previous tiers)

Version 55.0

•  Resolved an issue where the Hero buff was not being applied (bug fix)

Gallery

For more Mermonkey images, see Gallery:Mermonkey.

Screenshots

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Assets

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  Portrait
• 
  Icon
• 
  Buff icon
• 
  Insta Monkey icon

In other languages

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Trivia

• The Final Harmonic's buffs for Heroes are conceptually similar to the Heroic Presence and Heroic Academy upgrades for the cut Monkey Academy tower.