Fateful End

Whenever one or more creature cards are put into another player's graveyard from anywhere, you
may fateseal X, where X is equal to the number
of creature cards put into that graveyard. (To fateseal X, look at the top X cards of an opponent's library, then put any number of them on the bottom of that player's library and the rest on top in any order.)
Destinies are sewn with many threads of life.