Nim Deathmantle, Ashnod's Altar, and Diregraf Horde

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Diregraf Horde on the battlefield
• available

Steps

1. Activate Ashnod's Altar by sacrificing Diregraf Horde, adding
2. Diregraf Horde dies, triggering Nim Deathmantle, causing you to pay to return Diregraf Horde from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. Diregraf Horde enters the battlefield, creating two 2/2 Zombie creature tokens
4. Activate Ashnod's Altar by sacrificing a Zombie, adding
5. Repeat

Results

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