Medomai the Ageless + Sakashima's Student + Mirror Gallery + Slither Blade + Erratic Portal

Prerequisites

• Slither Blade does not have summoning sickness.

Steps

1. 1Declare Slither Blade as an attacker.
2. 2During 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. 3Deal combat damage with Sakashima's Student, causing you to take an additional turn after this one.
4. 4Cast Slither Blade by paying .
5. 5Activate Erratic Portal by paying and tapping it, returning Sakashima's Student from the battlefield to your hand.
6. 6Pass the turn.
7. 7Repeat.

Effects

• Infinite turns
• Lock