Vilis, Broker of Blood, Harmless Offering, and Underworld Dreams

Prerequisites

• Vilis, Broker of Blood on the battlefield
• Harmless Offering in hand
• Underworld Dreams on the battlefield
• available

Steps

1. Cast Harmless Offering by paying , giving an opponent control of Vilis
2. During that player's next draw step, they draw a card
3. Underworld Dreams triggers, dealing 1 damage to that opponent
4. Vilis triggers, causing the opponent to draw a card
5. Repeat from step 3

Results

• Infinite card draw for target opponent
• Infinite draw triggers for target opponent
• Near-infinite damage to target opponent