Spellbinding Soprano + Sprout Swarm + Parallel Lives

Prerequisites

• You have at least three opponents.
• You control at least two untapped creatures, one of which must be green.

Steps

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

Effects

• Infinite creature ETB
• Infinite magecraft triggers
• Infinite storm count
• Infinite tapped creature tokens