Harmonic Summoner

When Harmonic Summoner enters, create a 2/2
blue Bird creature token with flying.

Instants and sorceries in your graveyard have "Harmonize with creature token - {x}{u}, where X is this spell's mana value." (You may cast that card from your graveyard for its harmonize cost. You may tap a creature token you control to reduce that cost
by {x}, where X is its power. Then exile that spell.)