Assault Suit, and Barbarian Outcast

Prerequisites

• Assault Suit on the battlefield
• Barbarian Outcast on the battlefield
• Assault Suit attached to Barbarian Outcast
• A player controls no Swamps

Steps

1. If needed, give control of Barbarian Outcast to an opponent who controls no Swamps
2. When Barbarian Outcast's controller controls no Swamps, Barbarian Outcast triggers, causing them to sacrifice it
3. However, Barbarian Outcast cannot be sacrificed due to Assault Suit
4. Barbarian Outcast triggers again, creating a mandatory infinite loop that causes the game to end in a draw

Results

• Draw the game