Errant, Street Artist + Dramatic Reversal + Swarm Intelligence

Errant, Street Artist

Dramatic Reversal

Swarm Intelligence

How it works

1. Activate all mana producing nonland permanents you control by tapping them, adding at least 2.
2. Cast Dramatic Reversal by paying 1.
3. Swarm Intelligence triggers, creating a copy of Dramatic Reversal.
4. Activate Errant by paying 1 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 2.
7. Repeat from step 4.