Warjester Necromancer

When Warjester Necromancer enters the battlefield, return target Demon or creature with converted mana cost 3 or less from your
graveyard to the battlefield. You lose life equal to
the returned creature's converted mana cost.
Desperation - Whenever Warjester Necromancer attacks, if you have 5 or less life, return target
Demon or creature with converted mana cost 3
or less from your graveyard to the battlefield
tapped and attacking.