Unholy Avenger

Unholy Avenger gets +1/+1 as long as you
control a white permanent.
Unholy Avenger has first strike as long as you
control a red permanent.
Unearth {w}{b}{r} ({w}{b}{r}: Return this card from
your graveyard to the battlefield. It gains haste.
Exile it at the beginning of the next end step or if it
would leave the battlefield. Unearth only as a
sorcery.)