The Booster Bloon is a Basic Blooncard in Bloons Card Storm, introduced in version 3.0. It allows the player to select a Bloon on their side other than itself to increase its Delay by 1 and Health by 100. If it is the only Bloon on the player's side, the On Play effect does not trigger, as it cannot target itself, contrary to its description which implies any friendly Bloon.
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Booster Bloon is sort of the Bloon variant of the Improved Fortification, which only targets friendly Bloons but grants a HP boost. It has two charges but less HP boost and gives Bloontonium, unlike the aforementioned Power.
Like Improved Fortification, it works best on Double Bloons. However, to avoid the opponent's Return to Sender gaining full value, avoid boosting the same bloon twice.
The bloon itself is not much of a threat, but should not be ignored against aggro players, especially Zee Jay. The extra +100 HP is equivalent to a stronger Green Bloon placed into another bloon, plus another potential 70 HP from that Booster Bloon.
Health reduced ― 70 → 50
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Booster Bloon target menu
Booster Bloon boosting a Zee Jay Special
Attempting to tap own Booster Bloon on play will be denied
