Winternight Stories

You can cast a spell using harmonize even if it was somehow put into your graveyard without having been cast.

Tapping a creature won’t reduce colored mana components of harmonize costs.

“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.”