Nurgle, Plague Father

Trample, Double Strike, Infect, Lifelink, Indestructible, Protection from White
When Nurgle, Plague Father enters the battlefield, creatures your opponents control get
-X/-X until end of turn, and you proliferate X.
{1}{b}{g}, Remove a -1/-1 counter from target
creature : You gain 3 life.
If Nurgle, Plague Father would leave the battlefield, you lose 5 life and shuffle it into your library.