Deathrender, Gravedigger, Eternal Witness, and Viscera Seer

Prerequisites

• Deathrender on the battlefield
• Gravedigger in hand
• Eternal Witness on the battlefield
• Viscera Seer on the battlefield

Steps

1. Activate Viscera Seer by sacrificing Eternal Witness
2. Eternal Witness dies, triggering Deathrender, putting Gravedigger from your hand onto the battlefield and attaching Deathrender to it
3. Gravedigger enters the battlefield, returning Eternal Witness from your graveyard to your hand
4. Resolve the Viscera Seer ability from step 1, causing you to scry 1
5. Activate Viscera Seer by sacrificing Gravedigger
6. Gravedigger dies, triggering Deathrender, putting Eternal Witness from your hand onto the battlefield and attaching Deathrender to it
7. Eternal Witness enters the battlefield, returning Gravedigger from your graveyard to your hand
8. Resolve the Viscera Seer ability from step 5, causing you to scry 1
9. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite scry 1