Spirewhelp

Necro {1}{b}(If a creature card with {1}{b} in its
mana cost went to the graveyard from anywhere this
turn, this spell costs {u/r}{u/r} less to cast.)
Flying
When Spirewhelp enters play, you may pay 2 life
and exile a black creature card with converted
mana cost 2 or more from your graveyard to have
Spirewhelp either deal 2 damage to any target or
add {u/r}{u/r} during your next main phase.