Medomai the Ageless + Sakashima's Student + Triton Shorestalker + Mirror Gallery + Aegis Automaton

Medomai the Ageless

Sakashima's Student

Triton Shorestalker

Mirror Gallery

Aegis Automaton

How it works

1. Attack with Triton Shorestalker and when it isn't blocked, cast Sakashima's Student's for it's ninjutsu cost, paying 1 and returning Triton Shorestalker to hand.
2. Have Sakashima's Student enter the battlefield as a copy of Medomai the Ageless and deal combat damage, gaining you an extra turn.
3. During your second main phase, cast Triton Shorestalker for .
4. Return Sakashima's Student to your hand with Aegis Automaton for 4.
5. Pass the turn to yourself and repeat.