Nim Deathmantle, Ashnod's Altar, Dryad Arbor, and Springheart Nantuko

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Dryad Arbor on the battlefield
• Springheart Nantuko 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, Springheart Nantuko triggers, choosing not to pay and creating a 1/1 Insect creature token
4. Activate Ashnod's Altar by sacrificing the creature token, adding
5. Repeat

Results

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