Sharuum the Hegemon, and Infinite Reflection

Prerequisites

• Sharuum the Hegemon on the battlefield
• Infinite Reflection on the battlefield
• Infinite Reflection attached to Sharuum
• You have a way to cause another artifact creature to enter the battlefield under your control

Steps

1. Cause another artifact creature to enter the battlefield as a copy of Sharuum
2. Put the copy of Sharuum into your graveyard due to the legend rule
3. The copy of Sharuum's enter-the-battlefield ability triggers, returning an artifact creature from your graveyard to the battlefield as a copy of Sharuum
4. Repeat from step 2

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB