Fahzukai, God of the Abyss

Indestructible
As long as your devotion to black, green, and
blue is less than seven, Fahzukai isn't a creature.
Spells you cast with delve cost {1} less to cast.
{b}{g}{u}: Tap target creature. It doesn't untap
during its controller's next untap step. Put the
top three cards of your library into your
graveyard.