Cast Time Warp by paying its mana cost, causing you to take an extra turn after this one.
Activate Dust Bowl by paying 3, tapping it and sacrificing Mystic Sanctuary, destroying a nonbasic land.
Play Mystic Sanctuary from your graveyard.
When Mystic Sanctuary enters untapped, it triggers, putting Time Warp from your graveyard onto the top of your library.
Move to your next turn, drawing Time Warp during your draw step.
Repeat.
This loop gives you near-infinite turns by leveraging Mystic Sanctuary's ability to recycle spells whenever it enters the battlefield untapped. With the Forgotten Cellar side of Walk-In Closet // Forgotten Cellar unlocked, you gain the ability to play lands directly out of your graveyard, allowing Dust Bowl to sacrifice Mystic Sanctuary and feed it right back into play. Because you repeat this cycle to continuously cast Time Warp from your hand, Dust Bowl acts as a repeatable engine to strip away opposing lands while locking down the game in your favor.