Medomai the Ageless, Paleontologist's Pick-Axe // Dinosaur Headdress, and Brass Squire

Prerequisites

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

Steps

1. Declare any other creature as an attacker
2. Holding priority, activate Brass Squire by tapping it, attaching Dinosaur Headdress to the attacking creature, and causing the creature to become a copy of Medomai the Ageless
3. Deal combat damage using the creature
4. The creature 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 Brass Squire
7. Repeat each turn

Results

• Infinite turns