Righteous Bloodbath

Will of the Council - Starting with you, each player votes for siege or slaughter. If siege gets more votes, after your first postcombat main phase, there is an additional combat phase followed by
an additional main phase. At the beginning of that combat phase, untap all creatures you control. If slaughter gets more votes or the vote is tied, creatures you control gain double strike, trample, and vigilance until end of turn.