Displacer Kitten | Mana Echoes | Gemstone Array (and one other card)

Cards

({8} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) available.

Cast the copy of
Aqueous Aria spell from exile by paying its mana cost.
When you cast that spell,
Displacer Kitten triggers, flickering
Campus Composer, which enters prepared.
When
Campus Composer enters,
Mana Echoes triggers, adding at least ({C} magic symbol) .
Resolve the spell from step 1, creating a 3/3 Elemental creature token with flying.
When the token enters,
Mana Echoes triggers, adding ({C} magic symbol) for each Elemental you control.
Pay an additional ({2} magic symbol) ({U} magic symbol) to repeat steps 1 through 5 an additional time, this time adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) from the
Mana Echoes triggers.
Pay an additional ({1} magic symbol) ({U} magic symbol) to repeat the loop again, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
Pay an additional ({U} magic symbol) to repeat the loop again, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
Pay an additional ({U} magic symbol) to repeat the loop again, adding six ({C} magic symbol) .
Activate
Gemstone Array by paying ({2} magic symbol) , adding ({U} magic symbol) .
Repeat steps 1 through 5 and step 10 any number of times.

Mana needed drops significantly for each additional Merfolk, Bard, and Elemental you control.

This combo has been estimated to be Exhibition (Bracket 1+).

WARNING: Combo contains cards that have not been released yet (and are not yet legal in Commander)