Errant, Street Artist + Reality Spasm + Twinferno

Prerequisites

• You control at least two mana producing permanents, one of which can tap to produce at least .

Steps

1. 1Cast Twinferno by paying , copying the next instant or sorcery spell you cast.
2. 2Cast Reality Spasm by paying at least , targeting at least three permanents and choosing the untap mode.
3. 3Twinferno triggers, copying Reality Spasm, targeting at least three permanents.
4. 4Holding priority, activate at least two mana-producing permanents you control by tapping them, adding at least .
5. 5Activate Errant by paying and tapping it, copying the Reality Spasm copy, targeting Errant and at least two mana-producing permanents you control.
6. 6Resolve the copy of Reality Spasm from step 3, untapping Errant and at least two mana-producing permanents you control.
7. 7Repeat from step 4.

Effects

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