Hedge Shredder, Mortuary, Dryad Arbor, and Altar of Dementia

Prerequisites

• Hedge Shredder on the battlefield
• Mortuary on the battlefield
• Dryad Arbor on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Dryad Arbor
2. When Dryad Arbor dies, Mortuary triggers, putting Dryad Arbor from your graveyard onto the top of your library
3. Resolve the Altar of Dementia ability, causing you to mill Dryad Arbor
4. Hedge Shredder's second ability triggers, returning Dryad Arbor from your graveyard to the battlefield tapped
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers