Thousand-Year Storm | Storm-Kiln Artist | Unsubstantiate

Cards

Unsubstantiate in hand.
Thousand-Year Storm and
Storm-Kiln Artist on the battlefield.
You have at least one other instant or sorcery card in hand.
({1} magic symbol) ({U} magic symbol) plus enough mana to cast the other instant or sorcery available.

Cast any instant or sorcery by paying its mana cost.
Holding priority, cast
Unsubstantiate by paying ({1} magic symbol) ({U} magic symbol) , targeting that spell.
Thousand-Year Storm and
Storm-Kiln Artist trigger.
Resolve the
Storm-Kiln Artist trigger, creating a Treasure token.
Resolve the
Thousand-Year Storm trigger, copying
Unsubstantiate once for each instant or sorcery you've cast before it this turn, with each copy targeting the original
Unsubstantiate.
Storm-Kiln Artist triggers for each copy made this way, creating that many Treasure tokens.
Resolve the first copy of
Unsubstantiate, returning the original
Unsubstantiate to your hand.
All remaining
Unsubstantiate copies fizzle due to no longer having a legal target.
Holding priority, activate the Treasures by tapping and sacrificing them, adding ({1} magic symbol) ({U} magic symbol) .
Repeat from step 2.