Yinahulg,the Ever Storm

When Yinahulg enters the battlefield exile all
non-black creatures and destroy all non-horror creatures. Create four 3/4 black Tentacles
creature tokens withe Trample. If all Tentacles
tokens are destroyed sacrafice Yinahulg.
Place X storm counters on Yinahulg whenever a
card is removed from the battlefield where X is
that cards mana cost. If there are 20 or more
storm counters on Yinahulg you win the game.