Displacer Kitten + Molten-Core Maestro + Campus Composer // Aqueous Aria + Prosper, Tome-Bound

Displacer Kitten

Molten-Core Maestro

Campus Composer // Aqueous Aria

Prosper, Tome-Bound

How it works

1. Cast the copy of the spell from exile by paying its mana cost.
2. When you cast that spell, Molten-Core Maestro, Prosper, and Displacer Kitten trigger.
3. Resolve the Displacer Kitten trigger, blinking Campus Composer // Aqueous Aria, which enters prepared.
4. Resolve the Molten-Core Maestro trigger, putting a +1/+1 counter on it and adding an amount of equal to its power.
5. Resolve the Prosper trigger, creating a Treasure token.
6. Activate the Treasure token by tapping and sacrificing it, adding the one non-red mana you need to cast the spell from step 1.
7. Resolve the spell from step 1.
8. Repeat.