Zekomas, Slayer of Divine

Flash, Haste, Deathtouch
When Zekomas enters the battlefield, choose a
non-colorless creature. That creature gets -X/-X, where X is its owners devotion to that creature's colors.
If that creature dies this turn, put X +1/+1
counters on Zekomas. (Each colored mana symbol
in the mana costs of permanents a player controls
counts toward their devotion to the colors of
that mana.)