Vulmar, the First Bard

Bardic Inspiration—Whenever a creature or enchantment is put into a graveyard or exiled you may
pay {b/g}{g/w}{w/b}, if you do exile target creature with
converted mana cost less than or equal to the converted
mana cost of the creature or enchantment put into a graveyard or exiled.
Whenever another bard enters the battlefield
under your control, you may return target
creature exiled with Vulmar, the First Bard onto
the battlefield under your control.