Prerequisites
- Sprout Swarm in hand
- Mana Echoes on the battlefield
- You control at least three Saprolings
available
Steps
- Cast Sprout Swarm, paying
for the buyback - Mana Echoes triggers as the Saproling token ETBs, adding colorless mana equal to the number of Saprolings you control
- Spend the mana to cast Sprout Swarm again, convoking the new Saproling token to pay the colored mana cost
