Magma Eruption

Magma Eruption deals 2 damage to target
creature. If that creature would die this turn,
exile it instead.
Spell Mastery - If there are two or more
instant and/or sorcery cards in your graveyard,
Magma Eruption gains Flashback {2}{r}
(You may cast this card from your graveyard
for its flashback cost. Then exile it.)