Weapon Booster may be used once by a player to boost the weapon level of any weapon placed on any bunny in The Bunny Circle by the amount rolled on the Black 12-sided die. All weapon ranges remain unchanged. May be used at any time!
For example, let’s say that a fictional player Carol uses Sea Whiz Mount (Weapon Level 10) on an opponent’s bunny. She plays Weapon Booster immediately (since Weapon Booster is a Very Special), and rolls a 1 on the Black 12-sided die. The target bunny must now roll higher than 11 to survive, and the adjacent bunnies must roll higher than 10 to survive. The weapon increases its level (from 10 to 11), but does not increase its range.
Defense Cards are used to eliminate the effects of a weapon (for a single player) based solely on the original weapon level. A player with 10 Defense Units could protect his bunnies against Sea Whiz Mount used in our example even if Weapon Booster changed the weapon level to 11.
If Weapon Booster raises the weapon level beyond the maximum roll of the die (and the bunny has no Clovers), then it may be impossible for a player to roll a high enough number to survive.