Ruby, Destroyer Of Worlds

Flying, menace, double strike, protection from
green, red, blue and white
If Ruby is to die, instead exile it. After 3 turns,
return it to the battlefield tapped and attacking.
{2}{r}: Ruby fights another creature.
{x}{r}{r}: Ruby deals X plus 2 damage to target creature or planeswalker.
{ut}: There is an additional combat phase.