Displacer Kitten + Mana Echoes + Campus Composer // Aqueous Aria + Energy Refractor

Displacer Kitten

Mana Echoes

Campus Composer // Aqueous Aria

Energy Refractor

How it works

1. Cast the copy of Aqueous Aria spell from exile by paying its mana cost.
2. When you cast that spell, Displacer Kitten triggers, flickering Campus Composer, which enters prepared.
3. When Campus Composer enters, Mana Echoes triggers, adding at least C.
4. Resolve the spell from step 1, creating a 3/3 Elemental creature token with flying.
5. When the token enters, Mana Echoes triggers, adding C for each Elemental you control.
6. Pay an additional 2 to repeat steps 1 through 5 an additional time, this time adding CCC from the Mana Echoes triggers.
7. Pay an additional 1 to repeat the loop again, adding CCCC.
8. Pay an additional to repeat the loop again, adding CCCCC.
9. Pay an additional to repeat the loop again, adding six C.
10. Activate Energy Refractor by paying 2, adding one colored mana.
11. Repeat steps 1 through 5 and step 10 any number of times.