Nim Deathmantle, Ashnod's Altar, and Ogre Chitterlord

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Ogre Chitterlord on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Ogre Chitterlord, adding
2. When Ogre Chitterlord dies, Nim Deathmantle triggers, causing you to pay to return Ogre Chitterlord from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. When Ogre Chitterlord enters the battlefield, it triggers, creating two 1/1 Rat creature tokens and giving Rats you control +2/+0 until end of turn if you control five or more Rats
4. Activate Ashnod's Altar by sacrificing the Rat, adding
5. Repeat

Results

• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely powerful Rats you control until end of turn
• Infinite sacrifice triggers