Sharuum the Hegemon, and Machine God's Effigy

Prerequisites

• Sharuum the Hegemon on the battlefield
• Machine God's Effigy in hand
• available

Steps

1. Cast Machine God's Effigy by paying , choosing to have it enter the battlefield as a copy of Sharuum
2. Put Sharuum into your graveyard due to the legend rule
3. Machine God's Effigy's enters-the-battlefield ability triggers, returning Sharuum from your graveyard to the battlefield
4. Put Sharuum into your graveyard due to the legend rule
5. Sharuum's enters-the-battlefield ability triggers, returning itself from your graveyard to the battlefield
6. Repeat from step 4

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB