Errant, Street Artist, Reality Spasm, and Thousand-Year Storm

Prerequisites

• Errant, Street Artist on the battlefield
• Reality Spasm in hand
• Thousand-Year Storm on the battlefield
• available

Steps

1. Cast Reality Spasm by paying at least , targeting at least three permanents and choosing the untap mode
2. Thousand-Year Storm triggers, copying Reality Spasm at least once, targeting at least three permanents
3. Holding priority, activate at least two mana-producing permanents you control by tapping them, adding at least
4. Activate Errant by paying and tapping it, copying the Reality Spasm copy, targeting Errant and at least two mana-producing permanents you control
5. Resolve the copy of Reality Spasm from step 3, untapping Errant and at least two mana-producing permanents you control
6. Repeat from step 3

Results

• Infinite magecraft triggers
• Infinite mana permanents you control can produce
• Infinite untap of permanents you control