Errant, Street Artist + Dramatic Reversal + Twincast

Prerequisites

• Nonland permanents you control can tap to produce at least .

Steps

1. 1Activate all mana producing nonland permanents you control by tapping them, adding at least .
2. 2Cast Dramatic Reversal by paying .
3. 3Holding priority, cast Twincast by paying , creating a copy of Dramatic Reversal.
4. 4Activate Errant by paying and tapping it, creating a copy of the Dramatic Reversal copy.
5. 5Resolve the first Dramatic Reversal copy, untapping all nonland permanents you control.
6. 6Activate all mana producing nonland permanents you control by tapping them, adding at least .
7. 7Repeat from step 4.

Effects

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