Grixis

Grixis comes into play tapped unless you contol
a demon.

{t}: Add {u}, {b} or {r}.

{u}{b}{r}, Discard Grixis: Search your library for a
demon creature card, reveal it and put it into
your hand, shuffle your library.

When a creature enters the battlefeild from the
graveyard you may return grixis to your hand.