Emrakul, the Promised End + Erratic Portal + Unwinding Clock + Vedalken Orrery

Prerequisites

• You control artifacts that can produce enough mana to cast Emrakul, plus an additional .

Steps

1. 1Cast Emrakul by paying reduced by its first ability.
2. 2Emrakul's second ability triggers, causing you to gain control of an opponent's next turn and giving them an additional turn after that one.
3. 3Move to that opponent's next turn.
4. 4Unwinding Clock triggers, untapping all artifacts you control.
5. 5Activate artifacts by tapping them to add enough mana to cast Emrakul, plus an additional .
6. 6Activate Erratic Portal by paying and tapping it, returning Emrakul from the battlefield to your hand.
7. 7Repeat until the opponent you are controlling each extra turn has lost the game.
8. 8Repeat for each remaining opponent.

Effects

• Infinite turns for each opponent
• Lock
• You control your opponents on each of their turns