Tephraderm, Hive Mind, Star of Extinction, and Insult // Injury

Prerequisites

• Tephraderm on the battlefield
• Hive Mind on the battlefield
• Star of Extinction in hand
• Insult // Injury in hand
• undefined available

Steps

1. Give Tephraderm indestructible, if needed
2. Cast Insult by paying , doubling the damage sources you control deal this turn
3. Cast Star of Extinction by paying
4. Hive Mind triggers, causing each opponent to copy Star of Extinction
5. Resolve an opponent's Star of Extinction, destroying a land and dealing 20 damage to each creature and planeswalker
6. Tephraderm's second ability triggers, dealing 40 damage to the opponent who controlled the Star of Extinction copy due to Insult
7. Repeat from step 5 for each remaining Star of Extinction until each opponent loses the game

Results

• Near-infinite damage