Opposition

Tap an untapped creature you control: Tap target artifact, creature, or land.

Exhausting a wizard can be exhausting work.

Dominaria Remastered

Amonkhet Invocations

World Championship Decks 2002

World Championship Decks 2001

Once a player announces that they’re casting a spell or activating an ability, no player may take other actions until the spell or ability has been paid for. Notably, other players can’t try to tap that player’s permanents to stop them from paying {T} or to stop them from producing enough mana.

You can tap any untapped creature you control to activate Opposition’s ability, even one you haven’t controlled continuously since the beginning of your most recent turn.