Pentavus, Dross Scorpion, and Lavabrink Floodgates

Prerequisites

• Pentavus on the battlefield
• Dross Scorpion on the battlefield
• Lavabrink Floodgates on the battlefield

Steps

1. Activate Lavabrink Floodgates 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 Lavabrink Floodgates
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