Boss Battle (BCS)

For the event in Bloons Monkey City, see Boss Battle (BMC).

Boss Battle is an event in Bloons Card Storm introduced in version 4.0 that unlocks at level 3. In each event, the player can play matches against an AI-controlled Boss Bloon, who functions like an opposing Hero with a predetermined deck that can also be targeted and attacked by the player's Monkeys to deal damage, in addition to taking damage from the player's Bloons leaking. The boss cannot play its own Monkeys, only Bloons and Powers, but has several passive effects in addition to its own abilities and gains more as its health lowers. The player earns points for damaging the boss, and if they defeat it, they earn more points based on the number of turns it took. The player's score determines their placement on a leaderboard and contributes to the Global Score to unlock Global Milestone rewards for all players. Each boss has multiple stages with different abilities and decks, which changes based on the Global Score.

Mechanics

In Boss Battle mode, the opponent is a Boss Bloon that behaves similarly to an AI-controlled Hero. Monkeys can target the boss with their attacks like a Bloon to reduce its health directly, but they cannot apply additional effects to them on hit (such as On Fire or Stunned), and other effects (Hero abilities, Bloons, Powers, etc) do not treat them as Bloons. The boss has its own deck, which consists of only Bloon and Power cards (no Monkeys). Boss decks can have cards that are not available to players, such as Dreadbloon's Wrath of Dread.

The battle is split into multiple phases. When the player reduces the boss's health to zero, it enters the next phase, gains a new health pool, and triggers its Skull Event for that phase. Excess damage dealt by the finishing attack for the phase does not carry over to the next phase.

As a singleplayer mode, the player has unlimited time to wait in the lobby before starting the match, has unlimited time to mulligan their starting hand, and always goes first. The map is predetermined based on the boss and there is no Storm.

Match Effects

Match Effects are additional rules applied to Boss Battle matches. All Boss Battle events have the following rules:

• Monkeys can attack Boss Heroes directly
• Boss Heroes are not affected by ability bonuses or effects

This section is incomplete. You can help out by expanding it. The editor who added this notice elaborates: Add more stage rules

Each stage also has one of the following rules, which changes with each event:

• All Bloons have +1 Delay
• Boss starts with 100 Shield
• Both players start with 2 Gold
• Both players start with an extra card
• Bloons have +5 Health

Skull Events

Skull Events are effects that activate when the boss changes to the next phase. Each event has a different set of Skull Events for each stage.

Icon	Description
	Drop a Rock Pile on a random enemy Bloon space
	Drop a Rock Pile on a random enemy Monkey space
	Drop a Rock Pile on two random enemy Bloon spaces
	Dreadbloon gains 5 Gold
	Dreadbloon gains 10 Gold
	Dreadbloon draws 2 cards +1 per Phase
	Enemy Hero loses all Bloontonium
	Enemy Hero takes 50 damage + 50 per Phase
	Remove all enemy Bloons
	Remove all enemy Monkeys
	Remove first enemy Bloon
	Remove highest cost opposing Monkey
	Return all enemy Monkeys to hand
	Stun all enemy Monkeys

Scoring

This section is incomplete. You can help out by expanding it. The editor who added this notice elaborates: Add a table of scorings

This article is in need of research. You can help out by editing this article or discussing your findings on the talk page. The editor who added this notice elaborates: Does ONLY the final round of kill count for the total scores per stage? What is the actual real formula for kill score? (it seems like turn37 kill phase4 gives 4270 score?)

Score is based on how fast Dreadbloon is killed at each stage. Bonus points are appended to the Boss's total Health of combined phases for beating the Boss faster. Round bonus is independent from the score from beating Health from the Boss.

Rewards

Participation

Once per day, submitting any score more than 0 rewards  50 Monkey Money.

Global Milestones

Players will receive rewards from stages they have participated in.

Stage	Score required	Rewards
1	1,000,000	50  250  250
2	2,000,000	100  500  500
3	5,000,000	250  1,000  1,000

Leaderboards

Position	Rewards	Medal
1st	250  2,000  5,000
2nd	200  1,500  3,500
3rd	150  1,000  2,500
Top 20	100  500  2,000
Top 50	100  300  1,500
Top 100	75  250  1,000
Top 200	75  200  750
Top 25%	50  200  500
Top 50%	50  150  300
Top 75%	50  250
Top 100%	25  200

Schedule

Boss Battle runs every other Wednesday 22:00 UTC to Wednesday 22:00 UTC, lasting for 7 days. During a Boss Battle, the Mailbox will announce the Boss Battle starting or ending. After 22:00 UTC, the event button remains available for a few hours before announcing the final results in a wholescreen menu after going to the main menu. Some events may last for fewer days if a new update is coming soon.

Update history

Version 4.1

•  "Bloons squished by a dropped Rock no longer disagree with the server and put Bloons willy-nilly on the track" (undocumented)
•  "Leaderboards" is no longer misspelled as "leaderboads" on the leaderboard and game over screens (undocumented) (bug fix)

Version 4.2

•  Now displays a reticle on the Boss Bloon's health icon when Monkeys can target it

Version 4.3

•  Implemented the Banned Cards feature

Gallery

This article or section needs more screenshots. See the screenshot guidelines for more information on what screenshots are needed and how to add them. The editor that added this notice elaborates: Leaderboard menus (including daily, weekly, and rewards), rules list menu, banned deck warning in deck selection menu, and more

• 
  Dreadbloon's Boss Battle menu
• 
  Milestones
• 
  Event Leaderboard
• 
  Rewards (with Top 50 highlighted)
• 
  Boss Battle Lobby versus Dreadbloon
• 
  Event rules
• 
  Event rules with some banned cards
• 
  Deck selection menu, "Banned Cards" warning on multiple decks
• 
  Leaderboard with one user only
• 
  Red ribbon and the leaderboard placement visible on leaderboard
• 
  Cannot play Boss Battle due to the event recently ending
• 
  Rules menu during a match
• 
  Phase Skull Effects to be triggered after Boss Phase is destroyed
• 
  Rock Pile on Bloons skull event
• 
  Rock Pile on Monkeys skull event
• 
  Victory

Trivia

• Boss Rush from Bloons TD 6 is active during the same time period as Boss Battle from BCS.

In other languages

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