Nekusar, the Mindrazer, Vilis, Broker of Blood, and Switcheroo

Prerequisites

• Nekusar, the Mindrazer on the battlefield
• Vilis, Broker of Blood on the battlefield
• Switcheroo in hand
• An opponent controls a creature
• available

Steps

1. Cast Switcheroo by paying , exchanging control of Vilis and another creature with an opponent
2. During that opponent's draw step, they draw a card
3. Nekusar triggers, dealing 1 damage to the opponent
4. Vilis triggers, causing the opponent to draw a card
5. Repeat from step 3 until the opponent loses the game either due to drawing from an empty library, or from having 0 life

Results

• Near-infinite damage to target opponent
• Target opponent loses the game
• Infinite card draw for target opponent
• Infinite draw triggers for target opponent