Mudrudge, Writhing Void

Whenever a creature dies, put that card into your graveyard instead of anywhere else.
Mudrudge, Writhing Void gets +1/+0 for each creature card in your graveyard you don't own.
Dominance — Whenever a creature card is put into your graveyard, if Mudrudge has the highest power among creatures on the battlefield, each opponent loses 1 life and you gain 1 life.