Arctic Knight

Arctic Knight

Tridents grow in power faster. Ice Jet ability: Launches a barrage of bouncing ice balls following target priority, or targeted point.

Tower	Mermonkey — Path 2 — Tier 4
XP cost	16,000
Cash cost	$6,800 — Easy $8,000 — Medium $8,640 — Hard $9,600 — Impoppable

← Riptide Champion

Popseidon →

Arctic Knight is the Mermonkey's path 2 tier 4 upgrade in Bloons TD 6. In addition to the Ice Jet ability, tridents deal base 8 damage instead of 4, deal double base damage to MOAB-class, and grow in power faster (75% instead of 50%, 112.5% instead of 75% with 2-4-0). Wavelets also do 8 damage instead of 4.

The Ice Jet ability stops the trident attack, instead rapidly throwing ice balls for 3 seconds, with 45 seconds ability cooldown. By default, they attack targets anywhere on screen based on targeting priority. A targeting reticle can be placed anywhere on screen to only aim towards a specific point.

Mechanics

Trident

This upgrade gives the trident attack the following benefits over Riptide Champion:

• Increased base damage from 4 to 8, deals +4 damage to frozen Bloons and +8 damage to MOAB-Class Bloons.
• Trident wavelets do 8 damage instead of 4, deals +4 damage to frozen Bloons and +8 damage to MOAB-Class Bloons.
• Grows faster, by +75% instead of +50%, or +112.5% instead of +75% with 2-4-0.

Like previous upgrades, tridents grow in projectile radius and damage at a steady rate, and create two wavelets at 180° apart that deal non-scaling damage and lose projectile size as they travel. Tridents have 25 pierce.

Ice Jet

Ice Jet is Arctic Knight's Activated Ability. When activated, the Mermonkey stops throwing tridents and instead rapidly shoots ice balls for 3 seconds, at a rate of 0.1s per ice ball (affected by attack speed buffs), randomly spread over a 30° angle. Each ice ball deals 20 damage that doesn't soak through layers (meaning the extra damage only matters for Bloons with more than 1 health), has 240 pierce, and freezes non-MOAB-Class Bloons for 3 seconds. They can bounce off obstacles, but not the edges of the map, and can rehit Bloons after bouncing. They last for up to 10 seconds on screen normally and can carry over one round. The ability has a 45-second cooldown.

The ice balls deal frigid-type damage, but can pass through White and Zebra Bloons (without affecting them) instead of disappearing on contact, though they are neutralized by Purple Bloons as normal. If the tower has a buff that allows the ice balls to damage Bloons with White properties, such as Monkey Intelligence Bureau, then they will collide with White and Zebra Bloons as normal.

By default, this ability targets Bloons anywhere on-screen (even behind line of sight blockers) and prioritizes First, Last, Close, or Strong according to the tower's current targeting mode. The player can use the tower's Monkey Special to set a target position anywhere on-screen, which causes Ice Jet to aim at that marker instead. Using the Monkey Special again removes the marker and prevents it from being set again for 5 seconds afterwards. If the tower has a marker, then the ability is usable without requiring a Bloon to be on-screen, but if it does not have a marker, then the ability cannot be used if there are no Bloons on-screen, and if the tower does not have Camo detection, then Camo Bloons do not allow the ability to be used.

Crosspathing with Trident Swiftness increases the projectile speed of the ice balls by +50% while retaining their lifespan, thus increasing their total distance by the same amount.

Crosspathing with Echosense Precision reduces the random spread of the ice balls from 30° to 10° and allows the ice balls to hit Camo Bloons.

Stats

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

This data was last updated for: version 55.1

Tower
Display range 32 units Footprint radius 8 units Targeting options First Last Close Strong

Attack
Cooldown 1.5s Offset (X, Y, Z) -0.5, 3.4, 10.4 Targeting Depends on targeting option Targeting range 32 units Filters Cannot target Camo
Projectile Pierce 25 Damage 8 Damage to MOAB-Class +8 Damage to frozen +4 Damage type Frigid Speed 130 units/s Lifespan 1.5385s Radius 1 unit Filters Ignores White if its damage type cannot damage it Cannot hit Camo Freeze Multiplier ×0 Duration 1s Layers 5 Split projectile Count 2 Angle 180° Pierce 25 Damage 8 Damage to MOAB-Class +8 Damage to frozen +4 Damage type Frigid Speed 100 units/s Lifespan 2s Radius 1 unit Filters Ignores White if its damage type cannot damage it Cannot hit Camo Freeze Multiplier ×0 Duration 1s Layers ∞

Ability
Cooldown 45s Lifespan 3s Disables other attacks 3s
Attack Cooldown 0.1s Offset (X, Y, Z) 0, 0, 0 Targeting range ∞ units Filters Cannot target Camo Ignores blockers Projectile Angle 30° Pierce 240 Damage 20 Damage type Frigid Speed 260 units/s Lifespan 7.5s Persists between rounds 1 Radius 2 units Filters Ignores White if its damage type cannot damage it Cannot hit Camo Freeze Multiplier ×0 Duration 3s Layers 3

Buff when in water
Range modifier ×1.35

1-4-0

Attack
Cooldown 1.5s → 1.2s

2-4-0

Attack
Cooldown 1.2s → 0.825s
Projectile Speed 130 units/s → 195 units/s Lifespan 1.5385s → 1.0256s

Ability
Attack Projectile Speed 260 units/s → 390 units/s

0-4-1

Attack
Filters Can now target Camo
Projectile Seeking distance 80 units Seeking angle 360° Seeking rotation speed 169 °/s Filters Can now hit Camo Split projectile Filters Can now hit Camo

Ability
Attack Filters Can now target Camo Projectile Angle 30° → 10° Filters Can now hit Camo

0-4-2

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

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
0-4-0	$9,115	$10,725	$11,585	$12,870	$6,381	$7,508	$8,110	$9,009
1-4-0	$9,240	$10,875	$11,745	$13,050	$6,468	$7,613	$8,222	$9,135
2-4-0	$9,450	$11,125	$12,015	$13,350	$6,615	$7,788	$8,411	$9,345
0-4-1	$9,285	$10,925	$11,800	$13,110	$6,500	$7,648	$8,260	$9,177
0-4-2	$9,525	$11,205	$12,100	$13,445	$6,668	$7,844	$8,470	$9,412

Strategy

This section was last updated for: version 51.0

Arctic Knight excels on maps with obstacles, especially standing out on Dark Dungeons, because the Ice Jet ability can maximize its pierce and hit many more times on bloons. Its main attack does decent damage and freezing, though most of its power still comes from its ability. However, both its tridents and Ice Jet leave behind many White and Zebra Bloons so it should be combined with quick-attacking frozen-popping towers, such as Juggernaut.

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: 240 no longer reduces lifespan so this needs to be reevaluated

0-4-1 is the recommended crosspath for innate camo detection and greater accuracy of the Ice Jet, as 2-4-0 does not increase rate and the reduced lifespan is a downgrade.

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

”

•  Ice Jet: Projectile lifespan is now capped at 15 seconds
•  Ice Jet: Projectile damage type changed ― Shatter → Plasma

Version 45.0

“

While the Arctic Knight has been popular, Riptide Champion has major pierce issues and is seeing a price reduction as well as a pierce increase to make up for this. Arctic Knight itself is receiving the brand new damage type added this update; as it is gaining a weakness to White Bloons from this and wasn’t too wild before we are increasing the power as well & allowing the ability to carry over 1 round to prevent projectiles timing out immediately when cast at the end of a round.
— Update notes

”

•  Overall cost reduced by $625 (due to cost changes for previous tiers)
•  Pierce increased ― 14 → 15
•  Ability damage increased ― 15 → 20
•  Trident: damage type changed ― Plasma → Frigid
  • Note: Projectile will be destroyed when hitting White properties
•  Ability: damage type changed ― Plasma → Frigid
  • Note: Projectile will be destroyed when hitting White properties
•  Ability: projectiles now carry over 1 round

Version 46.0

“

While we were happy with Arctic Knight’s Ice Jet being a high pierce MOAB layer removal that could with other tower combinations be upgraded to a more effective full-clear, there is not currently enough varied ways of quickly dealing with White Bloon layers, so for a long cooldown based ability this heavy a weakness is too much for now.
— Update notes

”

•  Ice Jet: Projectiles pass through White or Zebra Bloons if they can't damage them, instead of destroying the projectile
•  Ice Jet: Projectile lifespan reduced ― 15s → 10s (undocumented)

2-4-0

•  Now reduces the lifespan of Ice Jet projectiles by 33% (undocumented)
  • Note: This means the maximum travel distance of Ice Jet projectiles is now the same as without the crosspath, since this crosspath increases their projectile speed by 50%

Version 47.0

“

Middle path pierce was lacking all through to T5, so pierce is now being matched to T5 across the path.
— Update notes

”

•  Trident: Pierce increased ― 12 → 18
  • Note: Popseidon unaffected
•  Split projectile: Pierce increased ― 12 → 18
  • Note: Popseidon unaffected

Version 48.0

“

Middle path is seeing a consistency improvement for Freeze Duration & White Bloons
— Update notes

”

•  Trident: Freeze duration increased ― 0.3s → 0.8s
•  Split trident: Freeze duration increased ― 0.3s → 0.8s
•  Trident: Now passes through White Bloon properties unless it can damage them

Version 49.0

“

[While talking about Riptide champion ...], and the rest of the path is also seeing a damage increase.
— Update notes

”

•  Overall cost reduced by $300 (due to cost changes for previous tiers)
•  Main and split projectiles: Damage increased ― 6 → 8
•  Main and split projectiles: Bonus damage to MOAB-Class Bloons increased ― +6 → +8
•  Main and split projectiles: Bonus damage to frozen Bloons increased ― +3 → +4 (undocumented)
• Description changed ― Tridents can pop Lead Bloons and grow in power faster. Ice Jet ability: Launches a barrage of bouncing ice balls following target priority, or targeted point. → Tridents grow in power faster. Ice Jet ability: Launches a barrage of bouncing ice balls following target priority, or targeted point.

Version 51.0

“

Mermonkey weren’t^[sic] feeling they favoured their natural habitat enough, so their Water Placement bonus is getting a boost. Middle Path Mermonkey just isn’t putting in the work we hoped, so we’re giving a couple price adjustments, a pierce increase across all tiers, and some light ability improvements to make it feel more rewarding.
— Update notes

”

•  Overall cost reduced by $400 (due to cost changes for previous tiers)
•  Ability: Projectiles can now bounce from map borders (undocumented)
  • Note: X-5-X could already bounce from borders
•  Trident: Pierce increased ― 18 → 25
•  Range bonus when placed in water increased ― +25% → +35%

2-4-0

•  Ability: Projectile lifespan increased ― 6.6667s → 10s

Version 52.0

•  Overall cost reduced by $975 (due to cost changes for previous tiers)
•  Ice Jet: Projectile speed increased ― 200 units/s → 220 units/s (undocumented)
•  Trident: Projectile speed increased ― 100 units/s → 110 units/s
•  Trident: Projectile lifespan decreased ― 2.0s → 1.8181s
  • Note: Maximum distance traveled by the projectile unchanged. Popseidon side tridents are also affected.
•  Ice Jet: Projectiles no longer bounce off map edges (bug fix)
  • Note: Popseidon unaffected

1-4-0

•  Trident: Attack cooldown reduced ― 1.02s → 0.96s (attack speed increased by 6.25%)
  • Note: Attack cooldown reduction from 0-0-0 increased from 15% to 20%. The patch notes do not specify that the attack speed buff is only for the main trident attack, all other attacks unchanged.

2-4-0

•  Trident: Attack cooldown reduced ― 0.804s → 0.66s (attack speed increased by 21.82%)
  • Note: Attack cooldown reduction from 1-x-x increased from 18% to 25%. The patch notes do not specify that the attack speed buff is only for the main trident attack, all other attacks unchanged.
•  Trident: Projectile speed increased ― 150 units/s → 165 units/s
•  Trident: Projectile lifespan decreased ― 1.3333s → 1.1212s
  • Note: Maximum distance traveled by the projectile unchanged. Popseidon side tridents are also affected.
•  Ice Jet: Projectile speed increased ― 300 units/s → 330 units/s (undocumented)

0-4-1, 0-4-2

•  Trident (seeking): Turn rate increased ― 130°/s → 143°/s (undocumented)

Version 53.0

“

Riptide Champion as an underappreciated star performed exceptionally well with recent changes which are now being scaled back and Popseidon which was also performing extremely well will likewise be scaled back
— Update notes

”

•  Overall cost increased by $300 (due to cost changes for previous tiers)
•  Range reduced ― 35 units → 32 units

Version 54.0

“

Mermonkey ended up somewhat underrated and overbuffed, mid tiers for top and middle paths have really stood out here lately and need to be reigned back in line.
— Update notes

”

•  Overall cost increased by $625 (due to cost changes for previous tiers)
•  Ability: Projectile speed increased ― 220 units/s → 260 units/s
  • Stacks with the 2-4-0 Trident Swiftness crosspath ― 330 units/s → 390 units/s
•  Ability: Projectile lifespan decreased ― 10s → 7.5s
  • Projectile distance reduced ― 2,600 units → 1,950 units
    • With 2-4-0 Trident Swiftness crosspath ― 3,300 units → 2,925 units
•  Main attack: Freeze duration for Rainbow Bloons and below increased ― 0.8s → 1s
•  Main attack: Freeze duration for Ceramic Bloons decreased ― 0.8s → 0.5s
•  Trident: Projectile speed increased ― 110 units/s → 130 units/s
  • Stacks with 2-X-0 Trident Swiftness crosspath ― 165 units/s → 195 units/s
•  Trident: Projectile lifespan decreased ― 1.8182s → 1.5385s
  • Stacks with 2-X-0 Trident Swiftness crosspath ― 1.2121s → 1.0256s
  •  Overall projectile distance remains unchanged (200 units) for all crosspaths
•  Trident: Attack cooldown increased ― 1.2s → 1.5s (attack speed reduced by 20%)
  • Stacks with 1-X-0 Trident Efficiency crosspath ― 0.96s → 1.2s
  • Stacks with 2-X-0 Trident Swiftness crosspath ― 0.66s → 0.825s

0-4-1, 0-4-2

•  Trident: Turn rate increased ― 143°/s → 169°/s

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