Grand Vizier Melantha

Whenever a nontoken creature an opponent controls leaves the battlefield or a creature card is put into their graveyard or exiled from an opponents hand or library, you may pay {1}{u}{u}. If you do, create a token that's a copy of that creature, except it's a 0/1 blue Illusion and gains "When this creature becomes the target of a spell or an ability, sacrifice it".

{5}{u}{b}, Sacrifice seven legendary Illusion tokens: You win the game.