Errant, Street Artist, Dramatic Reversal, and Chandra, Hope's Beacon

Prerequisites

• Errant, Street Artist on the battlefield
• Dramatic Reversal in hand
• Chandra, Hope's Beacon on the battlefield
• Nonland permanents you control can tap to produce at least
• You have not copied a spell using Chandra this turn
• available

Steps

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

Results

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