Kalevale, Merriment's Skulk

Flying, First Strike
Whenever an opponent casts a spell, they may
exile a creature or land card from their graveyard
with a veil counter. If they don't, they lose 2 life
and you gain 2 life.
When Kalevale attacks, you may pay X life. If you
do, return target permanent with mana value x or
less from the exiled cards with a veil counter onto
the battlefield under your control.