Prismari, the Inspiration | Storm-Kiln Artist

Cards

You have another nonland card in hand with the mana to cast it and applicable targets if needed.

Cast any spell by paying its mana cost.
Holding priority, cast
Unsubstantiate by paying its mana cost, targeting the spell cast in step 1.
Unsubstantiate's storm ability and
Storm-Kiln Artist trigger.
Resolve the
Storm-Kiln Artist trigger, creating a Treasure token.
Resolve the
Unsubstantiate trigger, copying it for each spell cast before it this turn. Choose to have each copy target the original
Unsubstantiate.
Storm-Kiln Artist triggers for each copy generated, creating that many Treasure tokens.
Resolve the first
Unsubstantiate copy, returning the original
Unsubstantiate to your hand.
All other copies of
Unsubstantiate fizzle due to having no legal target.
Activate two Treasures by tapping and sacrificing them, adding ({1} magic symbol) ({U} magic symbol) .
Repeat from step 2.

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