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. It unlocks the Ice Jet Activated Ability, which causes the Mermonkey to stop using its trident attack, instead rapidly firing ice balls straight ahead with a small degree of random spread, for 3 seconds. The ice balls deal 20 Frigid-type damage (which does not soak through layers) with 240 pierce, freeze up to 3 layers of non-MOAB-Class Bloons for 3 seconds, and can bounce off of walls. By default, the ability targets Bloons over infinite range according to the tower's current targeting option, but the player can also lock the attack in one direction like a Dartling Gunner by using its Monkey Special. Crosspathing with Echosense Precision reduces the random spread angle of the attack. It cooldown is 45 seconds.

This upgrade also improves the Mermonkey's trident attack. It increases the base damage of the tridents and wavelets from 4 to 8, and they now +4 damage to frozen Bloons and +8 damage to MOAB-Class Bloons. It also causes the tridents to grow in damage by 75% per second instead of 50%. With the Trident Swiftness crosspath, they grow in damage by 112.5% per second.

Ability

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 7.5 seconds on screen normally and can carry over one round, and has a lifespan cap of 15 seconds (which can be reached via external buffs). 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

This section is incomplete. You can help out by expanding it. The editor who added this notice elaborates: Add the proj lifespan cap (if it still exists when 44.1 added this)

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 52.1

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.

In most situations 2-4-0 is preferred to maximize coverage of the projectiles on optimal maps while 0-4-1 is preferred if innate camo detection is required or going for Popseidon, and the improved projectile accuracy via 0-4-1 is minor. For the main attack, 2-4-0 is preferred if pierce is used often or if there's not enough space to seek Bloons for increasing trident damage.

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

Gallery

For more Mermonkey images, see Gallery:Mermonkey.

Screenshots

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Assets

• 
  Portrait
• 
  Upgrade / ability icon
• 
  Insta Monkey icon

In other languages

This section was last updated for: version 55.2

Name

Language	Text	Notes
Arabic	فارس القطب الشمالي	—
Danish	Arktisk ridder	—
German	Arktischer Ritter	—
Spanish	Caballero ártico	—
Spanish (Latin America)	Caballero ártico	—
Finnish	Arktinen ritari	—
French	Chevalier arctique	—
Italian	Cavaliere artico	—
Japanese	北極ナイト	—
Korean	북극의 기사	—
Dutch	Poolridder	—
Norwegian	Arktisk ridder	—
Polish	Arktyczny rycerz	—
Portuguese (Brazil)	Cavaleiro Ártico	—
Russian	Арктический рыцарь	—
Swedish	Arktisk riddare	—
Thai	อัศวินขั้วโลก	—
Turkish	Arktik Şövalye	—
Chinese (simplified)	北极骑士	—
Chinese (traditional)	北極騎士	—

Description

Language	Text	Notes
Arabic	تنمو الرماح ثلاثية الشعب في قوتها بشكل أسرع. القدرة على نفث الثلج: تطلق وابلًا من كرات الثلج المرتدة وفقًا لأولوية الهدف أو النقطة المستهدفة.	—
Danish	Treforker vokser i kraft hurtigere. Isjet-evne: Lancerer en spærreild af hoppende isbolde efter målprioritet eller målrettet punkt.	—
German	Dreizacke können schneller stärker werden. Eisjet-Fähigkeit: Feuert ein Sperrfeuer an hüpfenden Schneebällen, die der Zielpriorität oder dem anvisierten Punkt folgen.	—
Spanish	Los tridentes pueden aumentar su poder más rápido. Habilidad Chorro de hielo: Lanza una andanada de bolas de hielo que rebotan y siguen el objetivo prioritario o el punto objetivo.	—
Spanish (Latin America)	Los tridentes se fortalecen más rápido. Habilidad Disparo helado: lanza una ráfaga de bolas de hielo que rebotan y siguen objetivos por prioridad o impactan en un punto elegido.	—
Finnish	Atraimien voima kasvaa nopeammin. Jääsuihku-kyky: Tulittaa pomppivilla jääpalloilla ensisijaista kohdetta tai tiettyä pistettä.	—
French	Les tridents gagnent en puissance plus rapidement. Aptitude Jet de glace : lance un barrage de balles de glace rebondissantes qui suivent la cible principale ou le point ciblé.	—
Italian	I tridenti aumentano più velocemente la potenza. Abilità Getto di ghiaccio: lancia una raffica di palle di ghiaccio rimbalzanti che seguono il bersaglio in base alla priorità o il punto mirato.	—
Japanese	三又槍のパワー増強のスピードが速くなる。アイスジェットのアビリティ：標的めがけ、または標的プライオリティに従い氷の弾丸を発砲する。	—
Korean	삼지창의 위력이 더 빨리 증가합니다. 빙탄 포화 능력: 표적우선순위 대상 또는 지정한 위치를 향해 통통 튀는 얼음 구체를 대량 발사합니다.	—
Dutch	Drietanden worden sneller sterker. Vaardigheid IJsstraal: lanceert een spervuur aan afketsende ijsballen die de doelprioriteit raken of het ingestelde doel raken.	—
Norwegian	Treforker blir raskt sterkere. Isjet-evne: Skyter et bombardement av sprettende isballer som følger målprioritet eller målpunkt.	—
Polish	Trójzęby szybciej zyskują moc. Umiejętność lodowa salwa: Wystrzeliwuje salwę odbijających się lodowych kul, które trafiają w wybrany cel lub spadają w wybrane miejsce.	—
Portuguese (Brazil)	Tridentes ganham poder mais rapidamente. Habilidade Jato de Gelo: lança uma barragem de bolas de gelo que seguem prioridade de alvo ou um ponto mirado.	—
Russian	Трезубцы быстрее набирают силу. Способность «Ледяной залп»: выстреливает прыгучими ледяными шарами, следующими за приоритетной или указанной целью.	—
Swedish	Treuddar växer i kraft snabbare. Isstråleförmåga: Avfyrar en spärreld av studsande isklot som följer det prioriterade målet eller punkten man siktar på.	—
Thai	ตรีศูรสะสมพลังได้เร็วขึ้น สกิลไอซ์เจ็ต: ยิงลูกบอลน้ำแข็งกระดอนจำนวนมากที่ไล่ตามเป้าหมายที่เหลือหรือจุดเป้าหมาย	—
Turkish	Yabalar daha hızlı güçlenir. Buz Jeti yeteneği: Hedef önceliğini veya hedeflenen noktayı takip eden bir sıçrayan buz topu yağmuru fırlatır.	—
Chinese (simplified)	三叉戟可以更快地增强威力。“冰雪喷射”能力：根据目标优先级或目标点发射一连串弹跳冰球。	—
Chinese (traditional)	三叉戟可以更快速度增長力量。冰球噴射技能：根據目標優先級或朝目標點發射一連串彈跳冰球。	—