Deathrender, Heirloom Blade, Ashnod's Altar, and Kozilek, Butcher of Truth

Prerequisites

• Deathrender on the battlefield
• Heirloom Blade on the battlefield
• Ashnod's Altar on the battlefield
• Kozilek, Butcher of Truth in hand

Steps

1. Activate Ashnod's Altar by sacrificing Kozilek, adding
2. When Kozilek dies, it, Heirloom Blade and Deathrender trigger
3. Resolve the Kozilek trigger, shuffling it into your library
4. Resolve the Heirloom Blade trigger, causing you to reveal cards from the top of your library until you reveal Kozilek and put it into your hand
5. Resolve the Deathrender trigger, putting Kozilek from your hand onto the battlefield and attaching Deathrender to it
6. Activate Heirloom Blade's equip ability by paying , attaching it to Kozilek
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana