Ratadrabik of Urborg, Gollum, Patient Plotter, and Altar of Dementia

Prerequisites

• Ratadrabik of Urborg on the battlefield
• Gollum, Patient Plotter on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Gollum
2. When Gollum dies, it and Ratadrabik trigger
3. Resolve the Ratadrabik trigger, creating a nonlegendary token copy of Gollum that is a 2/2 Zombie in addition to its other types
4. Resolve the Gollum trigger from step 2, causing the Ring to tempt you, and for the Gollum token to become your Ring-bearer, thus making it legendary
5. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Gollum's power
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill