Nim Deathmantle, Ashnod's Altar, and Basilica Shepherd

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Basilica Shepherd on the battlefield
• available

Steps

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

Results

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