Prismari, the Inspiration + Storm-Kiln Artist + Unsubstantiate

Prismari, the Inspiration

Storm-Kiln Artist

Unsubstantiate

How it works

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