Songcrafter Mage

A spell cast using harmonize will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.

If a card with harmonize is put into your graveyard during your turn, you can cast it if it’s legal to do so before any other player can take any actions.

“Harmonize [cost]” means “You may cast this card from your graveyard by paying [cost] and tapping up to one untapped creature you control rather than paying the spell’s mana cost,” “If you cast this spell using its harmonize ability, its total cost is reduced by an amount of generic mana equal to the tapped creature’s power,” and “If the harmonize cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack.”