Arcbond, Ephemeral Shields, Jeskai Charm, and Mirrorwing Dragon

Prerequisites

• Arcbond in hand
• Ephemeral Shields in hand
• Jeskai Charm in hand
• Mirrorwing Dragon on the battlefield
• an additional creature on the battlefield
• available

Steps

1. Before damage cast Ephemeral Shields, targeting any creature
2. Mirrorwing Dragon's ability triggers, copying Shields to the other creatures and giving each indestructible until the end of turn
3. Cast Jeskai Charm, choosing the mode to give your creatures lifelink until the end of turn
4. Cast Arcbond, targeting one of the creatures
5. Mirrorwing Dragon's ability triggers, copying Arcbond onto the other creatures
6. Once a creature takes damage, the ability given by Arcbond triggers, reflecting the damage onto all players and all other creatures
7. Because of lifelink, you gain life while all other players lose life
8. As the ability deals damage to the other creatures you control, their Arcbond abilities trigger in response, doing the same

Results

• Infinite damage