Venser, Corpse Puppet, Nim Deathmantle, Ashnod's Altar, and Core Prowler

Prerequisites

• Venser, Corpse Puppet on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Core Prowler on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Core Prowler, adding
2. Core Prowler dies, triggering itself and Nim Deathmantle
3. Resolve the Core Prowler trigger, causing you to proliferate
4. Venser triggers, creating a legendary 3/3 The Hollow Sentinel artifact creature token
5. Activate Ashnod's Altar by sacrificing The Hollow Sentinel, adding
6. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Core Prowler from your graveyard to the battlefield, and attach Nim Deathmantle to it
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite proliferate
• Infinite sacrifice triggers