Mortuary, Digsite Conservator, Ashnod's Altar, and Sifter of Skulls

Prerequisites

• Mortuary on the battlefield
• Digsite Conservator on the battlefield
• Ashnod's Altar on the battlefield
• Sifter of Skulls on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Digsite Conservator, adding
2. When Digsite Conservator dies, it, Mortuary and Sifter of Skulls trigger
3. Resolve the Sifter of Skulls trigger, creating a 1/1 Eldrazi Scion creature token
4. Activate Ashnod's Altar by sacrificing the Eldrazi Scion, adding
5. Resolve the Mortuary trigger, putting Digsite Conservator on top of your library from your graveyard
6. Resolve the Digsite Conservator trigger, causing you to pay to exile Digsite Conservator from the top of your library and cast it without paying its mana cost
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count