Tyrant Lich of Urd

This card costs {1} less to cast for each creature in
your graveyard
Exile a creature from your graveyard, add {g} or {b} to your mana pool equal to its cmc, then lose
life equal to its cmc.
Tyrant Lich of Urd’s power and toughness are
equal to the number of creatures in your
graveyard