Pyres to Pyros

Until end of turn, creatures you control gain "Whenever this creature deals combat damage to a player, sacrifice it. It deals damage equal to its power to target creature or planeswalker" and "When this creature dies, if it wasn't sacrificed, it deals damage equal to its power to target opponent." At the beginning of your next end step, you lose the game. Exile Pyres to Pyros.
"A fire mage? No, I c