Deathrender + Gravedigger + Eternal Witness + Altar of Dementia
4-card combo · BG
Verdict
Yes — this 4-card loop mills every library at the table by bouncing Gravedigger and Eternal Witness through Deathrender indefinitely.
- Cards required
- 4
- Cheapest stack total
- $30.78
- Color identity
- BG
- Popularity
- 5 decks
- Format
- Commander
Deathrender turns each sacrifice into a free creature deployment: Eternal Witness dies to Altar of Dementia, Gravedigger drops in and retrieves Eternal Witness, then Gravedigger dies and Eternal Witness retrieves Gravedigger back. Every pass through the loop mills a target for 2 from Gravedigger and 2 from Eternal Witness, adding up fast against 99-card libraries. This sits naturally in Golgari aristocrats shells — Meren of Clan Nel Toth and Jarad, Golgari Lich Lord both want every piece independently.
Recipe
How it works
01
Prerequisites
Deathrender attached to Eternal Witness.
02
Steps
- Activate Altar of Dementia by sacrificing Eternal Witness.
- Eternal Witness dies, triggering Deathrender, putting Gravedigger from your hand onto the battlefield and attaching Deathrender to it.
- Gravedigger enters the battlefield, returning Eternal Witness from your graveyard to your hand.
- Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Eternal Witness' power.
- Activate Altar of Dementia by sacrificing Gravedigger.
- Gravedigger dies, triggering Deathrender, putting Eternal Witness from your hand onto the battlefield and attaching Deathrender to it.
- Eternal Witness enters the battlefield, returning Gravedigger from your graveyard to your hand.
- Resolve the Altar of Dementia ability from step 5, causing target player to mill cards equal to Gravedigger's power.
- Repeat.
03
Result
Infinite death triggers; Infinite ETB; Infinite LTB; Infinite mill; Infinite sacrifice triggers; Infinite self-mill
Variations
Cheaper, tighter, alternate lines
Phyrexian Altar can replace Altar of Dementia if the goal is infinite mana over infinite mill, though that requires a separate outlet to close. Whisper, Blood Liturgist swaps in as the sacrifice engine if Altar of Dementia is removed, at the cost of tapping rather than activating at instant speed. Any tutor that fetches enchantments — Enlightened Tutor, Vampiric Tutor for Deathrender — gets the loop online since the equipment is the hardest piece to replace.
Verified on Commander Spellbook · Combo ID altar-of-dementia-eternal-witness-gravedigger
Updated . Data from Commander Spellbook, Scryfall, and EDHREC.









