Spellfire Glutton

When Spellfire Glutton enters the battlefield,
you may cast an instant or sorcery spell in your graveyard with mana value equal to Spellfire
Gluttons mana value or lower.
Vortex 1 (When you cast this spell, you may discard
up to 1 instant or sorcery card. Copy this spell once for
each card discarded this way.)
It grows more hungry for every spell it eats.