Requires

Summon the School must be in hand. Ashnod's Altar must be on the battlefield. Prismite must be on the battlefield. Doubling Season must be on the battlefield. Mana needed:

Steps

1. Cast Summon the School for , creating four Merfolk creature tokens.
2. Activate Summon the School by tapping four untapped Merfolk, returning it to your hand.
3. Activate Ashnod's Altar by sacrificing a Merfolk token, adding .
4. Repeat step 3 an additional two times.
5. Activate Prismite for , adding .
6. Repeat.

Results