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Bonus Doubler is a three-tiered passive type A skill which debuted in Fire Emblem Heroes; the individual tiers of the skill are known as Bonus Doubler 1, Bonus Doubler 2, and Bonus Doubler 3 in order from lowest to highest. Units with a Bonus Doubler skill multiply any bonuses currently in place on it whenever they're in combat; the multiplication factor increases with the skill's tier, with the skill's name only being truly indicitave at the third tier as the multiplier does not double the bonuses in the first two tiers.
(Bonus Doubler 1)
|20px||Bonuses in place on the user during combat are multiplied by ×1.5.||--||--||Cost: 60 SP|
(Bonus Doubler 2)
|Bonuses in place on the user during combat are multiplied by ×1.75.||--||--||Cost: 120 SP|
(Bonus Doubler 3)
|Bonuses in place on the user during combat are multiplied by ×2.||--||--||Cost: 240 SP|
|Units||Roy: Blazing Lion|
Etymology and other languages
|Names, etymology and in other regions|
|Language||Name||Definition, etymology and notes|
|English||Bonus Doubler 1
Bonus Doubler 2
Bonus Doubler 3