Heart of Oak (BTD6)

For the upgrade in Bloons TD Battles 2, see Heart of Oak (Battles 2).

Heart of Oak

	Attacks convert Regrow Bloons into normal Bloons. Gains 1% pierce for every life gained from the starting value after the upgrade. Maxes at 100% and diminishes if lives are lost.

Tower		Path	Tier
Druid		2	2

XP cost	600
Cash cost	$295 — Easy $350 — Medium $380 — Hard $420 — Impoppable

← Thorn Swarm

Druid of the Jungle →

Heart of Oak is the Druid's path 2 tier 2 upgrade in Bloons TD 6. It allows all attacks of the Druid to remove the Regrow property on damage. Additionally it also gains +1% pierce for each life above the original life count for a max of +100% pierce.

Stats

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

This data was last updated for: version 55.1

Tower
Display range 35 units Footprint radius 7 units Targeting options First Last Close Strong

Attack
Cooldown 1.1s Offset (X, Y, Z) -1.99, 8.17, 7 Targeting Depends on targeting option Targeting range 35 units Pierce per extra life +1% Max extra lives for pierce 100 Filters Cannot target Camo
Projectile Count 8 Angle 25° Pierce 1 Damage 1 Damage type Sharp Speed 340 units/s Lifespan 0.3s Radius 0 units Filters Cannot hit Camo Removes Regrow if the target takes damage from this projectile

1-2-0

Attack
Projectile Pierce 1 → 2 Damage type Sharp → Normal

2-2-0

Lightning
Cooldown 2.3s Offset (X, Y, Z) -3.52, 6.06, 7 Targeting Depends on targeting option Targeting range 35 units Pierce per extra life +1% Max extra lives for pierce 100 Filters Cannot target Camo
Lightning Pierce 5 Max pierce 5 Damage 2 Damage type Plasma Bounce distance 86 units Radius 0 units Filters Cannot hit Camo Ignores blockers Removes Regrow if the target takes damage from this projectile

0-2-1

Tower
Display range 35 units → 45 units

Attack
Targeting range 35 units → 45 units
Projectile Lifespan 0.3s → 0.4s

0-2-2

Attack
Speed per life lost +1% Speed per life lost base bonus +10% Max lives lost for attack speed 40

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
0-2-0	$845	$1,000	$1,080	$1,200	$592	$700	$756	$840
1-2-0	$1,140	$1,350	$1,460	$1,620	$798	$945	$1,022	$1,134
2-2-0	$1,860	$2,200	$2,380	$2,640	$1,302	$1,540	$1,666	$1,848
3-2-0	$3,305	$3,900	$4,215	$4,680	$2,314	$2,730	$2,951	$3,276
4-2-0	$7,130	$8,400	$9,075	$10,080	$4,991	$5,880	$6,353	$7,056
5-2-0	$58,130	$68,400	$73,875	$82,080	$40,691	$47,880	$51,713	$57,456
0-2-1	$930	$1,100	$1,190	$1,320	$651	$770	$833	$924
0-2-2	$1,185	$1,400	$1,515	$1,680	$830	$980	$1,061	$1,176
0-2-3	$1,695	$2,000	$2,165	$2,400	$1,187	$1,400	$1,516	$1,680
0-2-4	$3,690	$4,350	$4,705	$5,220	$2,583	$3,045	$3,294	$3,654
0-2-5	$41,940	$49,350	$53,305	$59,220	$29,358	$34,545	$37,314	$41,454

Strategy

This section was last updated for: version 55.2

Heart of Oak is strongly recommended for any Lych battle to stop Lych's regeneration for cheap. It is the cheapest anti-Regrow option except Ezili's Heartstopper. In some cases, 0-2-0 Druid is worth the extra 3 tiers in Least Tiers Boss Events, especially against Elite Lych, being able to prevent Lych from healing more than the defenses can burst it down.

Otherwise, Heart of Oak is a decent method of degrow with 2-2-0 at minimum against groups; however, the actual best method of Heart of Oak's degrow is progressing to Druid of the Jungle, whose vine brambles degrow damaged Bloons constantly. The extra pierce on life gains is useless if life regeneration is banned. There's rarely a case where pierce-capping is a major concern, compared to extra attack speed from Heart of Vengeance, and Heart of Thunder cannot gain pierce buffs.

Update history

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

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Version 30.0

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

Version 39.0

“

Experimenting more with druid ‘life play’ functionality, similar to Heart of vengeance, we’re adding new functionality to Heart of Oak along with improved means of building into this with the Jungle’s Bounty upgrade — Update notes

”

•  Now gains a new buff – gains 1% pierce for every life gained from the starting value after the upgrade. Maxes at 100% and diminishes if lives are lost. Includes crosspathed attacks, excluding lightning (which can't be pierce-buffed).

Version 55.0

•  Main attack: Projectile spread can now be affected by accuracy buffs

Gallery

For more Druid images, see Gallery:Druid.

Screenshots

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Assets

• 
  Portrait
• 
  Upgrade icon
• 
  Insta Monkey icon

In other languages

Language	Name / Description	Notes
Arabic	قلب البلوط تعمل الهجمات على تحويل البالونات القادرة على إعادة النمو إلى بالونات عادية. يمكنك الحصول على قدرة اختراق بنسبة 1% مقابل كل حياة تكتسبها من القيمة الأولية بعد الترقية. يصل حدها الأقصى إلى 100% ويأخذ في التناقص في حال فقدان الأرواح.	—
Danish	Egehjerte Angreb konverterer regenereredede bloons til normale bloons. Får 1 % springkraft for hvert liv opnået fra startværdien efter opgraderingen. Maksimerer ved 100 % og aftager, hvis liv mistes.	—
German	Eichenherz Angriffe verwandeln Runderneuerte Bloons in normale Blooms. Erhält 1 % Durchschlagskraft für jedes erhaltene Leben vom Startwert nach dem Upgrade. Maximal bis 100 % und verringert sich, wenn Leben verloren werden.	—
Spanish	Corazón de roble Los ataques convierten a los bloons regenerativos en bloons normales. Obtiene 1 % de perforación por cada vida perdida desde el valor inicial después de la mejora. El máximo es 100 % y disminuye si se restauran vidas.	—
Spanish (LA)	Corazón de roble Los ataques convierten a los Bloons Regenerativos en Bloons normales. Obtiene 1 % por cada vida perdida desde el valor inicial después de la mejora. El máximo es 100 % y disminuye si se pierden vidas.	—
Finnish	Tammisydän Hyökkäykset muuttavat uudistuvat bloonit tavallisiksi blooneiksi. Saa 1 % lävistystä jokaista päivityksen jälkeen saavutettua lähtöarvoa kohti. Maksimiarvo on 100 % ja vähenee, jos elämiä menetetään.	—
French	Cœur de chêne Les attaques transforment les Bloons regonflés en Bloons normaux. Gagne 1 % de pouvoir perforant pour chaque vie obtenue à partir de la valeur de départ après l'amélioration. Plafonné à 100 % et diminue si des vies sont perdues.	—
Italian	Cuore di quercia Gli attacchi trasformano i bloon rigeneranti in bloon normali. Conferisce l'1% di perforazione per ogni vita guadagnata dal valore iniziale al momento del potenziamento. Il massimo è al 100% e diminuisce quando si perdono delle vite.	—
Japanese	ナラの木の心 攻撃すると再生ブルーンがふつうのブルーンになる。アップグレードするとスタート時点からライフを獲得するごとに、貫通が1%増える。最大値は100%で、ライフが失われると減少する。	—
Korean	참나무의 심장 공격에 맞은 재생 풍선이 일반 풍선으로 바뀝니다. 관통력이 업그레이드 이후 시작값에서 잃은 목숨당 1%씩 올라갑니다. 최대 100%까지 올라가며, 목숨을 잃으면 다시 내려갑니다.	—
Dutch	Hart van de Eik Aanvallen veranderen Hergroeiende Bloons in normale Bloons. Krijgt 1% doorboring voor elk verkregen leven vanaf de upgrade. Wordt maximaal 100% en vermindert als levens verloren raken.	—
Norwegian	Eikehjerte Angrep konverterer gjenvoksende bloons til normale bloons. Gir 1 % gjennomtrengning for hvert liv du har fått fra startverdien etter oppgraderingen. Maks. er 100 % og reduseres hvis liv går tapt.	—
Polish	Serce dębu Ataki zmieniają odrastające blony w zwykłe blony. Dodaje 1% przebicia za każde zyskane życie względem wartości początkowej po ulepszeniu. Maksimum to 100%. Znika po straceniu żyć.	—
Portuguese (Brazil)	Coração de Carvalho Ataques convertem Bloons Regeneradores em Bloons normais. Ganha 1% de perfuração por cada vida ganhada a partir do valor inicial após a melhoria. Maximiza em 100% e diminui se vidas forem perdidas.	—
Russian	Дубовое сердце Атаки превращают растущие шары в обычные. Даёт 1% пробивания за каждую полученную жизнь, начиная со стартового количества после улучшения. Максимум: 100%, и бонус уменьшается при потере жизней.	—
Swedish	Ekhjärtat Attackerna förvandlar återväxande Bloons till normala Bloons. Ger 1 % högre genomslag för varje förlorat liv från startvärdet efter uppgraderingen. Maxar på 100 % och minskar om liv återställs.	—
Thai	หัวใจไม้โอ๊ค โจมตีบลูนที่ฟื้นขึ้นมาใหม่ได้ให้เป็นบลูนธรรมดา ได้พลังการเจาะเพิ่ม 1% ทุก ๆ ชีวิตที่ได้ตั้งแต่ต้นหลังจากการอัปเกรด ได้สูงสุด 100% และลดลงมาถ้าเสียชีวิต	—
Turkish	Meşe Merkezi Saldırılar, Yeniden Şişen Bloon'ları normal Bloon’lara dönüştürür. Yükseltmeden sonra başlangıç değerinden itibaren elde edilen her can için %1 delme kazanır. %100’de maksimuma çıkar ve canlar kaybedilirse azalır.	—
Chinese (simplified)	橡树之心 攻击可将重生气球转化为普通气球，且升级后每获得一条生命就能获得穿透力初始数值的1%。增加值上限为100%，失去生命后减少。	—
Chinese (traditional)	橡樹之心 攻擊可將重生氣球轉換成普通氣球。升級後每次獲得超過初始值的生命值，穿透力提高1%。最多提高100%，且會在生命損失後失效。	—
This list was last updated for: version 43.1