Magar of the Magic Strings, Time Stop, and Warrior's Oath

Prerequisites

• Magar of the Magic Strings on the battlefield
• Time Stop in the graveyard
• Warrior's Oath in hand
• available

Steps

1. Cast Warrior's Oath by paying its mana cost, causing you to take an extra turn after this one and to lose the game at the beginning of that turn's end step
2. Activate Magar by paying , noting Warrior's Oath and putting it face down on the battlefield as a 3/3 creature
3. Activate Magar by paying , noting Time Stop and putting it face down on the battlefield as a 3/3 creature
4. During your next turn, deal combat damage to an opponent using the face down creatures that have Warrior's Oath and Time Stop noted
5. The creatures trigger
6. Resolve the first trigger, casting a copy of Warrior's Oath without paying its mana cost
7. Resolve the copy, causing you to take an extra turn after this one and to lose the game at the beginning of that turn's end step
8. Resolve the second trigger, casting a copy of Time Stop without paying its mana cost
9. Resolve the copy, causing you to end the turn
10. This will prevent the Warrior's Oath trigger from causing you to lose the game
11. Repeat from step 3

Results

• Infinite turns