Lisert, corpse awakener

If a creature card would be put into a graveyard
from play exile it instead with a corpse counter
on it, corpse counters remain on this creature
as it moves to any zone other than a player's hand
or library.
You may cast creature cards with a corpse
counter from exile. Spells cost {2} more to cast
for each corpse couner on them
"You will serve me"