Pentavus, Dross Scorpion, and Hedron Archive

Prerequisites

• Pentavus on the battlefield
• Dross Scorpion on the battlefield
• Hedron Archive on the battlefield

Steps

1. Activate Hedron Archive by tapping it, adding
2. Activate Pentavus's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token
3. Activate Pentavus's second ability by paying and sacrificing the Pentavite
4. When the Pentavite dies, Dross Scorpion triggers, untapping Hedron Archive
5. Resolve the Pentavus ability, putting a +1/+1 counter on it
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers