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Every 15 seconds, either: Steal 2 lives from opponent (assault mode), or add 2 lives (defend mode)
~ BTDB Mobile description

Attrition is the second upgrade of Path 2 for COBRA. It allows players to either steal 2 lives from their opponent (on Assault Mode) or add 2 lives to themselves (Defend Mode) once every 15 seconds. Many of these can be a threat for opponents in Assault mode and considered an overpowered upgrade to many - especially to newer players. If the opponent has 1 life left, or an Attrition affects the opponent at 2 lives, the Attrition attack will not decrease lives lower than 1 but instead reward $30.

It costs $600.

Version History (Bloons TD Battles Mobile)[]

While Attrition remains a powerful way to weaken the opponent, Attrition will no longer KO the opponent. Prior to this, players with COBRA in their loadout could use Attrition as an unbeatable win condition.

3.1
  • NERF If the opponent has only 1 life left, another Attrition will not kill the opponent, but instead provide the player $30.

Gallery[]

Trivia[]

  • Exactly 75 Attritions (19 minutes w/ 1 COBRA or 15 seconds w/ 75 COBRAS) is needed to bring an opponent down to 1 life in Assault mode (as long your opponent does not Attrition you back or use the Support Chinook ability), or to go to full health in Defensive mode.
  • There is a glitch that if a player gains more than 150 lives with the Support Chinook ability and then uses Attrition, the amount of lives resets back to 150.
  • When looking at the game code, the way in which Attrition's life-gaining capability works isn't simply just a gain of lives. In the game code relating to the Attrition algorithm, the game actually generates a Support Chinook crate worth 2 lives that picks up automatically.
    • The file that the code for this is in is called "CobraMonkeyLifeVampire.weapon", instead of something like "CobraMonkeyAttrition.weapon".
  • Attrition's life-stealing does not return to Bloons TD Battles 2, but the concept of stealing an opponent's currency returns to Agent Jericho, the successor of the COBRA. Instead of stealing lives passively, he has an activated ability that steals cash every second for a limited time.
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