Havran, Right Hand of Grenth

Vigilance.
Whenever Havran, Right Hand Of Grenth
Attacks, you may return target creature card with
a converted mana cost less than or equal to this
cards power from the graveyard to the battlefield
with the added type Spirit.
"Follow where I lead, come whence I call, and the
rotted corpses of the dead will be yours to control" - Scriptures of Grenth