Magda, Brazen Outlaw, Kyren Negotiations, Duergar Mine-Captain, and Goldspan Dragon

Prerequisites

• Magda, Brazen Outlaw on the battlefield
• Kyren Negotiations on the battlefield
• Duergar Mine-Captain on the battlefield
• Goldspan Dragon on the battlefield
• Duergar Mine-Captain does not have summoning sickness

Steps

1. Tap Duergar Mine-Captain to Kyren Negotiations to deal 1 damage
2. Magda triggers, creating a Treasure token
3. Tap and sacrifice that token for
4. Pay and untap Duergar Mine-Captain to give attacking creatures you control +1/+0
5. Repeat

Results

• Infinite damage
• Infinite power for attacking creatures