Atemsis, All-Seeing, Legion Loyalty, and Mirror Box

Prerequisites

• Atemsis, All-Seeing on the battlefield
• Legion Loyalty on the battlefield
• Mirror Box on the battlefield
• Atemsis does not have summoning sickness
• Opponents can not block and kill creatures you control
• You have at least six cards in hand with different mana values

Steps

1. Declare Atemsis as an attacker
2. Atemsis' myriad ability triggers, creating a token copy of Atemsis tapped and attacking each other opponent
3. Deal combat damage using each Atemsis, triggering their abilities
4. Resolve each Atemsis trigger, causing you to reveal your hand and causing each opponent to lose the game

Results

• Each opponent loses the game