Thousand-Year Storm, Storm-Kiln Artist, and Unsubstantiate

Prerequisites

• Thousand-Year Storm on the battlefield
• Storm-Kiln Artist on the battlefield
• Unsubstantiate in hand
• You have at least one other instant or sorcery card in hand
• plus enough mana to cast the other instant or sorcery available

Steps

1. Cast any instant or sorcery by paying its mana cost
2. Holding priority, cast Unsubstantiate by paying , targeting that spell
3. Thousand-Year Storm and Storm-Kiln Artist trigger
4. Resolve the Storm-Kiln Artist trigger, creating a Treasure token
5. 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
6. Storm-Kiln Artist triggers for each copy made this way, creating that many Treasure tokens
7. Resolve the first copy of Unsubstantiate, returning the original Unsubstantiate to your hand
8. All remaining Unsubstantiate copies fizzle due to no longer having a legal target
9. Holding priority, activate the Treasures by tapping and sacrificing them, adding
10. Repeat from step 2

Results

• Infinite colored mana
• Infinitely powerful Storm-Kiln Artist
• Infinite magecraft triggers
• Infinite storm count
• Infinite Treasure tokens