Moonlight Obliterator

If a creature dealt damage by Moonlight
Obliterator this turn would die, exile it instead.
{1}{w}{b}: Moonlight Obliterator gains your choice
of deathtouch, lifelink, or indestructible until
end of turn.
{t}: Put a creature card exiled with Moonlight Obliterator chosen at random onto the battlefield
under your control. Activate this ability only if
you have 20 or more life than an opponent.