Ratadrabik of Urborg, Gollum, Patient Plotter, and Ashnod's Altar

Prerequisites

• Ratadrabik of Urborg on the battlefield
• Gollum, Patient Plotter on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Gollum, adding
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. Repeat

Results

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