Yersinia Rex, The Virulent

Deathtouch
Creatures with Deathtouch have Toxic 1 and Wither
If a creature with a -1/-1 counter would die, exile it
with a Virulence counter on it
You may play exiled cards with Virulence counters,
pay life equal to double their converted mana cost.
Such is Yersinia Rex's virulence that even death is
no protection against it, and the dead too rise up and
join the immeasurable riot of flyblown corpses.