Requires

Spellbinding Soprano must be in the graveyard. Sprout Swarm must be in hand. Birgi, God of Storytelling // Harnfel, Horn of Bounty must be on the battlefield. You have at least three opponents. You control an untapped green creature. Mana needed:

Steps

1. Activate Spellbinding Soprano's encore ability by paying and exiling it from your graveyard, creating two token copies of it with haste for each opponent you have.
2. Declare each Spellbinding Soprano token as an attacker.
3. Each Spellbinding Soprano token triggers, causing instant and sorcery spells you cast this turn to cost less to cast for each Spellbinding Soprano token.
4. Cast Sprout Swarm with buyback by paying and tapping a green creature you control.
5. Birgi triggers, adding .
6. Resolve Sprout Swarm, creating a 1/1 Saproling creature token and returning Sprout Swarm to your hand.
7. Repeat from step 4.

Results