Assault Suit, and Manta Ray

Prerequisites

• Assault Suit on the battlefield
• Manta Ray on the battlefield
• Assault Suit attached to Manta Ray
• A player controls no Islands

Steps

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

Results

• Draw the game