Ratadrabik of Urborg, Leyline of Singularity, and Reckless Barbarian

Prerequisites

• Ratadrabik of Urborg on the battlefield
• Leyline of Singularity on the battlefield
• Reckless Barbarian on the battlefield

Steps

1. Activate Reckless Barbarian by sacrificing it
2. When Reckless Barbarian dies, Ratadrabik triggers, creating a token copy of Reckless Barbarian that is a 2/2 legendary Zombie in addition to its other types
3. Repeat using the Reckless Barbarian token

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite red mana
• Infinite creature sacrifice triggers