Nim Deathmantle, Ashnod's Altar, Dryad Arbor, and Seed the Land

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Dryad Arbor on the battlefield
• Seed the Land on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Dryad Arbor, adding
2. When Dryad Arbor dies, Nim Deathmantle triggers, causing you to pay to return Dryad Arbor from your graveyard to the battlefield, and attaching Nim Deathmantle to it
3. When Dryad Arbor enters the battlefield, Seed the Land triggers, creating a creature token
4. Activate Ashnod's Altar by sacrificing the creature token, adding
5. Repeat

Results

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