Tempt in the Night

Gain control of target creature with
converted mana cost less than or equal to
your devotion to blue plus your devotion
to black. Untap that creature. It gains haste
until end of turn. It's blue and black in
addition to it's other colors.
As long as Tempt in the Night is in your
graveyard, Cards in your graveyard count
toward your devotion.