(An ongoing scheme remains face up until it’s abandoned.)
At the beginning of combat on your turn, up to one target creature gets +2/+2 and gains vigilance until end of turn. It can’t be blocked this turn.
At the beginning of each opponent’s end step, if that player has less than half their starting life total, abandon this scheme.
In a game with shared life totals (such as a game of Commander Archenemy), effects that reference a player's life total use the team's shared life total.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.