The Chain Veil, Chandra, Torch of Defiance, Chandra, Bold Pyromancer, and Ral Zarek

Prerequisites

• The Chain Veil on the battlefield
• Chandra, Torch of Defiance on the battlefield
• Chandra, Bold Pyromancer on the battlefield
• Ral Zarek on the battlefield

Steps

1. Activate Chandra, Torch of Defiance's second ability by putting a loyalty counter on it, adding
2. Activate Chandra, Bold Pyromancer's first ability by putting a loyalty counter on it, adding and dealing 2 damage to a player
3. Activate The Chain Veil by paying and tapping it, allowing you an additional activation of your planeswalkers' loyalty abilities this turn
4. Activate Ral Zarek's first ability by putting a loyalty counter on it, tapping any permanent and untapping The Chain Veil
5. Repeat

Results

• Infinite activations of loyalty abilities of all other Planeswalkers you control
• Infinite damage