Maralilia the Betrayed

Flying, vigilance, ethereal (This creature cannot
block or be blocked by nonethereal creatures and
cannot be targeted by nonethereal spells or abilities.
Damage dealt by this creature to nonethereal targets
and damage dealt by nonethereal sources to this
creature is reduced to 0. This creature cannot be
sacrificed)
When Maralilia the Betrayed dies, you may exile
her. If you do gain control of target creature with
converted mana cost 3 or less.