Mycosynth Lattice, and Hellkite Tyrant

Prerequisites

• Mycosynth Lattice on the battlefield
• Hellkite Tyrant on the battlefield

Steps

1. Deal combat damage to an opponent using Hellkite Tyrant
2. Hellkite Tyrant triggers, causing you to gain control of all permanents that player controls, as they'll all be artifacts due to Mycosynth Lattice
3. At the beginning of your upkeep, if you control twenty or more artifacts, Hellkite Tyrant will trigger, causing you to win the game

Results

• Gain control of all permanents an opponent controls during each of your turns
• Lock
• Win the game at the beginning of your next upkeep