Medomai the Ageless, Paleontologist's Pick-Axe // Dinosaur Headdress, and Armory Automaton

Prerequisites

• Medomai the Ageless in exile
• Paleontologist's Pick-Axe // Dinosaur Headdress on the battlefield
• Armory Automaton on the battlefield
• You control at least one additional creature
• Armory Automaton does not have summoning sickness and cannot be blocked by an opponent
• Paleontologist's Pick-Axe on the battlefield as Dinosaur Headdress
• Medomai the Ageless exiled by Dinosaur Headdress
• each turn available

Steps

1. Declare Armory Automaton as an attacker
2. Armory Automaton triggers, causing you to attach Dinosaur Headdress to it, and causing Armory Automaton to become a copy of Medomai the Ageless
3. Deal combat damage using Armory Automaton
4. Armory Automaton triggers, causing you to take an extra turn after this one
5. Move to your postcombat main phase
6. Activate Dinosaur Headdress' equip ability by paying , attaching it to any other creature you control
7. Repeat each turn

Results

• Infinite turns