Medomai the Ageless, Sakashima's Student, Mirror Gallery, Soltari Foot Soldier, and Erratic Portal

Prerequisites

• Medomai the Ageless on the battlefield
• Sakashima's Student in hand
• Mirror Gallery on the battlefield
• Soltari Foot Soldier on the battlefield
• Erratic Portal on the battlefield
• Soltari Foot Soldier does not have summoning sickness
• Opponents can not block and kill Soltari Foot Soldier
• each turn available

Steps

1. Declare Soltari Foot Soldier as an attacker
2. During the declare blockers phase, when you recieve priority, activate Sakashima's Student's Ninjutsu ability by paying and returning Soltari Foot Soldier from the battlefield to your hand, putting Sakashima's Student from your hand onto the battlefield tapped and attacking as a copy of Medomai
3. Deal combat damage with Sakashima's Student, causing you to take an additional turn after this one
4. Cast Soltari Foot Soldier by paying
5. Activate Erratic Portal by paying and tapping it, returning Sakashima's Student from the battlefield to your hand
6. Pass the turn
7. Repeat

Results

• Infinite turns