Nim Deathmantle, Ashnod's Altar, Tangled Colony, and Pandemonium

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Tangled Colony on the battlefield
• Pandemonium on the battlefield
• Tangled Colony has been dealt damage this turn
• available

Steps

1. Activate Ashnod's Altar by sacrificing Tangled Colony, adding
2. When Tangled Colony dies, it and Nim Deathmantle triggers
3. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Tangled Colony from your graveyard to the battlefield, and attach Nim Deathmantle to it
4. When Tangled Colony enters the battlefield, Pandemonium triggers, dealing damage equal to Tangled Colony's power to any target
5. Resolve the Tangled Colony trigger, creating a 1/1 Rat creature token
6. When the Rat enters the battlefield, Pandemonium triggers, dealing 1 damage to Tangled Colony
7. Activate Ashnod's Altar by sacrificing the Rat, adding
8. Repeat

Results

• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers