Obeka, Brute Chronologist, Magar of the Magic Strings, and Last Chance

Prerequisites

• Obeka, Brute Chronologist on the battlefield
• Magar of the Magic Strings on the battlefield
• Last Chance in hand
• An opponent is unable to block and kill creatures you control
• available

Steps

1. Cast Last Chance by paying , causing you to take an extra turn after this one
2. Activate Magar by paying , noting Last Chance and putting it face down as a 3/3 creature
3. Move to your next turn
4. Deal combat damage to an opponent with the face down creature
5. The face down creature triggers, causing you to cast a copy of Last Chance without paying its mana cost
6. Resolve the copy of Last Chance, causing you to take an extra turn after this one
7. At the beginning of your end step, Last Chance triggers
8. Holding priority, activate Obeka by tapping it, ending the turn
9. Repeat from step 3

Results

• Infinite turns