Tephraderm, Hive Mind, Star of Extinction, and Furnace of Rath

Prerequisites

• Tephraderm on the battlefield
• Hive Mind on the battlefield
• Star of Extinction in hand
• Furnace of Rath on the battlefield
• undefined available

Steps

1. Give Tephraderm indestructible, if needed
2. Cast Star of Extinction by paying
3. Hive Mind triggers, causing each opponent to copy Star of Extinction
4. Resolve an opponent's Star of Extinction, destroying a land and dealing 40 damage to each creature and planeswalker due to Furnace of Rath
5. Tephraderm's second ability triggers, dealing 80 damage to the opponent who controlled the Star of Extinction copy due to Furnace of Rath
6. Repeat from step 4 for each remaining Star of Extinction

Results

• Near-infinite damage