Requires

Errant, Street Artist must be on the battlefield. Dramatic Reversal must be in hand. Repeated Reverberation must be in hand. Nonland permanents you control can tap to produce at least . Mana needed:

Steps

1. Activate all mana producing nonland permanents you control by tapping them, adding at least .
2. Cast Repeated Reverberation by paying , causing you to create two copies of the next instant spell you cast this turn.
3. Cast Dramatic Reversal by paying .
4. Repeated Reverberation triggers, creating two copies of Dramatic Reversal.
5. Resolve a copy of Dramatic Reversal, untapping all nonland permanents you control.
6. Activate all mana producing nonland permanents you control by tapping them, adding at least .
7. Activate Errant by paying and tapping it, creating a copy of the Dramatic Reversal copy.
8. Repeat from step 5.

Results