Murktide Regent — Modern Horizons 2 Promos #52p

Delve (Each card you exile from your graveyard while casting this spell pays for .)

Flying

This creature enters with a +1/+1 counter on it for each instant and sorcery card exiled with it.

Whenever an instant or sorcery card leaves your graveyard, put a +1/+1 counter on this creature.