Nim Deathmantle, Ashnod's Altar, and Seraph of the Scales

Prerequisites

• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Seraph of the Scales on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Seraph of the Scales, adding
2. When Seraph of the Scales dies, its afterlife ability and Nim Deathmantle trigger
3. Resolve the Seraph of the Scales trigger, creating two 1/1 Spirit creature tokens
4. Activate Ashnod's Altar by sacrificing a Spirit, adding
5. Resolve the Nim Deathmantle trigger from step 2, causing you to pay to return Seraph of the Scales from your graveyard to the battlefield, and attach Nim Deathmantle to it
6. Repeat

Results

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