Belthyr, the Unscathed

Twilight {1}{w}{u}{r}(You may cast this card for its
Twilight cost from your graveyard or exile as long as
the total color identity among permanents you control matches the color identity of this card.)
Flash
Protection from white, blue, black, red, and colorless.
Whenever Belthyr, the Unscathed attacks, you
may exile target non-land permanent until the beginning of your next turn. You gain life equal
to that card's converted mana cost.