How it works
Prerequisites
- You have at least one other instant or sorcery card in hand.
Steps
- 1Cast any instant or sorcery by paying its mana cost.
- 2Holding priority, cast Unsubstantiate by paying , targeting that spell.
- 3Thousand-Year Storm and Storm-Kiln Artist trigger.
- 4Resolve the Storm-Kiln Artist trigger, creating a Treasure token.
- 5Resolve 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.
- 6Storm-Kiln Artist triggers for each copy made this way, creating that many Treasure tokens.
- 7Resolve the first copy of Unsubstantiate, returning the original Unsubstantiate to your hand.
- 8All remaining Unsubstantiate copies fizzle due to no longer having a legal target.
- 9Holding priority, activate the Treasures by tapping and sacrificing them, adding .
- 10Repeat from step 2.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?