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

Medomai the Ageless

Sakashima's Student

Mirror Gallery

Slither Blade

Aegis Automaton

How it works

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 1 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 4, returning Sakashima's Student from the battlefield to your hand.
6. Pass the turn.
7. Repeat.