|“||Gains attack speed up to 100 lives lost after getting this upgrade, Lives above maximum do not count.||”|
|~ BTD6 official description|
Heart of Vengeance is the second upgrade of Path 3 for the Druid. It gives the Druid 1% more attack speed for every life lost after the upgrade is bought, with the buff stacking to up to 90 lives lost. Conversely, gaining lives will reduce Heart of Vengeance attack speed bonuses by 1% per life gained, down to 0% bonus. As of Version 9.0, the default attack speed bonus is 10%; the player needs to lose 90 net lives to reach its maximum speed.
It costs $300 on Medium.
- Just as losing lives will increase attack speed, gaining lives will make Druids with this upgrade attack slower. It is best not to use life gaining strategies with this path of upgrades, such as with Benjamin, Support Chinook's Supply Crate ability, or the Spirit of the Forest upgrade.
- Lives absorbed by the Mana Shield do not count towards the attack boost. Similarly, lives gained by Mana Shield do not count against the attack boost either.
- Using a Continue will decrease Heart of Vengeance bonuses, as using a Continue gains lives, thus lowering Heart of Vengeance bonus.
+10% permanent attack speed buff upon upgrading. This is part of the potential 100% attack speed buff.
- Heart of Vengeance used to be useless on CHIMPS Mode, but has since changed after Version 9.0 by providing +10% bonus attack speed by default.