Derevi, Empyrial Tactician + Mycosynth Lattice + City of Shadows + Panharmonicon

Prerequisites

• There are at least three storage counters on City of Shadows.

Steps

1. 1Activate Derevi's ability to put him onto the battlefield from the command zone.
2. 2Target City of Shadows with both Derevi's enter the battlefield ability and the copy of that ability from Panharmonicon.
3. 3When the copy of Derevi's trigger untaps City of Shadows, activate City of Shadows' first ability, exiling Derevi.
4. 4Elect to put Derevi in the command zone.
5. 5When Derevi's trigger untapping City of Shadows, activate City of Shadows' second ability to add mana.
6. 6Repeat.

Effects

• Infinite colored mana
• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite untap of creatures you control