Ryxthos, Day's End

Indestructible, hexproof
As long as you're devotion to white and
black is less then 7, Ryxthos is not a creature
Whenever you cast a more than 3 white spells
with cmc 3 or more in one turn, you take
an extra turn after this one. Whenever you cast
more than 5 black spells in one turn, end the turn.