Aegis Automaton, Medomai the Ageless, Mirror Gallery, Sakashima's Student, and Slither Blade

Prerequisites

• Aegis Automaton on the battlefield
• Medomai the Ageless on the battlefield
• Mirror Gallery on the battlefield
• Sakashima's Student in hand
• Slither Blade on the battlefield
• Slither Blade does not have summoning sickness
• each turn available

Steps

1. Declare Slither Blade as an attacker
2. During the declare blockers phase, when you recieve priority, activate Sakashima's Student's Ninjutsu ability by paying and returning Slither Blade 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 Slither Blade by paying
5. Activate Aegis Automaton by paying , returning Sakashima's Student from the battlefield to your hand
6. Pass the turn
7. Repeat

Results

• Infinite turns