Sharuum the Hegemon, Ratadrabik of Urborg, and Ashnod's Altar

Prerequisites

• Sharuum the Hegemon on the battlefield
• Ratadrabik of Urborg on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Sharuum, adding
2. Sharuum dies, triggering Ratadrabik, creating a nonlegendary copy of Sharuum that is a 2/2 Zombie in addition to its other types
3. The Sharuum token enters the battlefield, returning Sharuum from your graveyard to the battlefield
4. Sharuum enters the battlefield, returning any artifact from your graveyard to the battlefield
5. Repeat

Results

• Infinite blinking of artifact creatures
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Put all artifacts from your graveyard onto the battlefield