Archlich Andrakar

Whenever a creature is put into the graveyard from the battlefield, or an opponent loses life, place a necromancy counter on Archlich Andrakar. You get +1/+1 for each necromancy counter.

Book of Undeath:
Remove one necromancy counter, {t}; surveil 1.
Remove two necromancy counters, {t}; you may cast a creature card from your graveyard this turn.
Remove three necromancy counters, {t}; you may play a card from your graveyard this turn.