Pentavus, Dross Scorpion, and Coveted Jewel

Prerequisites

• Pentavus on the battlefield
• Dross Scorpion on the battlefield
• Coveted Jewel on the battlefield
• Pentavus has at least two +1/+1 counters

Steps

1. Activate Coveted Jewel by tapping it, adding three mana of any one color
2. Activate Pentavus first ability by paying and removing +1/+1 counter, creating a 1/1 Pentavite token
3. Activate Pentavus second ability by paying and sacrificing a Pentavite, putting a +1/+1 counter on itself
4. Dross Scorpion triggers, untapping Coveted Jewel
5. Repeat

Results

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