Medomai the Ageless, Triton Shorestalker, Sakashima's Student, Crystal Shard, and Mirror Gallery

Prerequisites

• Medomai the Ageless on the battlefield
• Triton Shorestalker on the battlefield
• Sakashima's Student in hand
• Crystal Shard on the battlefield
• Mirror Gallery on the battlefield
• Triton Shorestalker does not have summoning sickness
• available

Steps

1. Attack with Triton Shorestalker and when it isn't blocked, cast Sakashima's Student's for it's ninjutsu cost, paying 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 Crystal Shard for
5. Pass the turn to yourself and repeat

Results

• Infinite turns