Blade of the Bloodchief, Pentavus, and Ashnod's Altar

Prerequisites

• Blade of the Bloodchief on the battlefield
• Pentavus on the battlefield
• Ashnod's Altar on the battlefield
• Blade of the Bloodchief attached to Pentavus
• You control at least one additional creature

Steps

1. Activate Ashnod's Altar by sacrificing another creature, adding
2. When the creature dies, Blade of the Bloodchief triggers, putting a +1/+1 counter on Pentavus
3. Activate Pentavus' first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite artifact creature token
4. Repeat

Results

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