Collector of Skulls

Overflow (If there are eight or more noncreature
spells in your graveyard, the battlefield becomes
flooded for the rest of the game.)
Submerge (This creature can't be blocked while
the battlefield is flooded.)
Aftergloom — At the beginning of each end step,
if a creature died this turn, each player mills two
cards, and you gain 2 life.