Errant, Street Artist + Reality Spasm + Doublecast

Prerequisites

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

Steps

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

Effects

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