Azalea, Vexing Hero

When Azalea enters or leaves the battlefield, you may cast an instant or sorcery card from a graveyard. You may spend mana
as though it were mana of any type to cast spells this way. If a spell cast this way would be put into a graveyard, exile it instead.

Azalea's power is equal to the number of instants and sorceries in all graveyards.