Empower — Riftbound Rules

Empower is an Activated Ability keyword. Empower is functionally short for “[Cost]: Empower this. Play only if not Empowered.”

Section 442 — 9 rules

442.1.: Empowering is the act of rendering one or more Game Objects Empowered.
442.1.a.: Empowered is a binary state. A Game Object is Empowered or it isn’t.
442.1.b.: An Empowered Game Object can not be Empowered.
442.1.c.: If a Game Object is instructed to be Empowered when it is already Empowered, nothing additional happens.
442.1.c.1.: Some effects may grant a Game Object permission to be Empowered multiple times. Such an effect ignores this restriction. For these Game Objects, Empowered is not a binary state but a stacking status.
442.2.: “Empowered” is a state for Game Objects on the board that other game effects and abilities can reference.
442.2.a.: When a Game Object becomes Empowered as a result of the Empower game action, that is an event that can similarly be referenced by game effects and abilities.
442.3.: Empowering is a Limited Action.
442.3.a.: Players may only Empower Game Objects when directed to by Game Effects.