Age of the Duskborn

Whenever a creature you control dies, put a quest counter on Age of the Duskborn. At the beginning of your upkeep, choose the effect equal to the number of counters on Age of the Duskborn.

1 - 2) Creatures you control get +2/+0 until end of turn.

3 - 6) Exile the top card of target library. You may cast that card this turn by paying life equal to its mana value.

7+) Return a creature from each graveyard to the battlefield under your control. Sacrifice Age of the Duskborn.