Leyline of Singularity, Phyrexian Dreadnought, and Ratadrabik of Urborg

Prerequisites

• Leyline of Singularity on the battlefield
• Phyrexian Dreadnought in hand
• Ratadrabik of Urborg on the battlefield
• available

Steps

1. Cast Phyrexian Dreadnought by paying
2. When Phyrexian Dreadnought enters the battlefield, it triggers, causing you to sacrifice it
3. When Phyrexian Dreadnought dies, Ratadrabik of Urborg triggers, creating a token copy of Phyrexian Dreadnought that is a 2/2 Zombie, and that is legendary due to Leyline of Singularity
4. Repeat from step 2

Results

• Draw the game
• Infinite death triggers
• Infinite ETB
• Infinite LTB