Medomai the Ageless, Sakashima's Student, Mirror Gallery, Gudul Lurker, and Crystal Shard

Prerequisites

• Medomai the Ageless on the battlefield
• Sakashima's Student in hand
• Mirror Gallery on the battlefield
• Gudul Lurker on the battlefield
• Crystal Shard on the battlefield
• Gudul Lurker does not have summoning sickness
• each turn available

Steps

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

Results

• Infinite turns