Gurg, Lord of the Swamp

Whenever you draw a card you may discard 2 cards.
Whenever a creature card enters your graveyard
from your library or hand you may exile it,
if you do put a muck counter on it.
You may cast creatures you own from exile
with muck counters on them by paying 2 life
and {b}{b}{g}{g}, if you do
they are a black and green zombie in
addition to its other types and colors.
If a creature cast this way dies exile it.