Pink Horror, Nim Deathmantle, and Ashnod's Altar

Prerequisites

• Pink Horror on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Pink Horror, adding
2. Pink Horror dies, triggering itself and Nim Deathmantle
3. Resolve the Pink Horror trigger, creating two 2/2 Blue Horror creature tokens
4. Activate Ashnod's Altar by sacrificing a Blue Horror, adding
5. Resolve the Nim Deathmantle trigger from step 2, paying to return Pink Horror from your graveyard to the battlefield and attach Nim Deathmantle to it
6. Repeat
7. Once you have infinite Blue Horror tokens, you may cast an instant or sorcery spell to deal infinite damage to any number of targets

Results

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