Thor, God of Thunder, Time Walk, and The Mind Stone

Prerequisites

• Thor, God of Thunder on the battlefield
• Time Walk in hand
• The Mind Stone on the battlefield
• each turn available

Steps

1. Cast Time Walk by paying its mana cost
2. Thor's second ability triggers, dealing damage to any target
3. Resolve Time Walk, causing you to take an extra turn after this one Blink Thor using The Mind Stone
4. When Thor enters, it triggers, exiling Time Walk from your graveyard and allowing you to cast it from exile until the end of your next turn
5. Move to your next turn
6. Cast Time Walk from exile by paying its mana cost
7. Repeat from step 2

Results

• Infinite turns
• Lock