World at War (ROE-172) Edge of Eternities They have "Sacrifice this token:

They have "Sacrifice this token: Add {C}

it deals 5 damage to each opponent and each creature they control instead

Commander creatures you own have "Whenever you cast a spell from exile

and Serpents

Whenever you cast a colorless spell

World at War (ROE-172) Edge of Eternities They have "Sacrifice this token:After the second main phase this turn, there's an additional combat phase followed by an additional main phase. At the beginning of that combat, untap all creatures that attacked this turn. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)