Frightful Aura

Whenever a creature you don't control dies from permanent, instant, and/or a sorcery you control, creatures you don't control get -2/-2 until end of turn.
Whenever an opponent loses the game from a permanent, instant, and/or a sorcery you control, you win the game.
If you are dealt 10 or more damage during a turn from permanents an opponent controls sacrifice Frightful Aura.