Viserion, Lost to the Night

Flying, haste, deathtouch
{r}: This creature gets +1/+0 until end of turn.
{u}{b}: Return this card to your hand. Only play
this ability if Viserion, Lost to the Night is in
your graveyard.
Viserion no longer knew hunger, or home, or flame.
He only knew the chill of ice, and the will of the Night
King.