Nim Deathmantle, Ashnod's Altar, and Goblin Goliath

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Goblin Goliath on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Goblin Goliath, adding
2. When Goblin Goliath dies, Nim Deathmantle triggers, causing you to pay to return Goblin Goliath from your graveyard to the battlefield and attach Nim Deathmantle to it
3. When Goblin Goliath enters, it triggers, creating at least one creature token
4. Activate Ashnod's Altar by sacrificing a creature token, adding
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite sacrifice triggers