Ulutherox, Null Preeminent

Afflict 7, Indestructible, Menace
If there are ten or more creature cards total in all graveyards, this spell costs {7} less to cast.
At the beginning of your upkeep, put a despair
counter on Ulutherox, Null Preeminent, then
each player exiles X permanents they control
and/or cards from their hand, where X is the
number of despair counters on Ulutherox,
Null Preeminent.