Hostile Hostel // Creeping Inn

Commander is where Hostile Hostel // Creeping Inn has the most room to breathe — sacrifice-heavy builds with commanders like Judith, the Scourge Diva or Chainer, Nightmare Adept can feed it steadily enough to flip it at a reasonable pace, and the life-drain on the transformed side punishes the table rather than just one opponent. In 60-card formats like Modern and Pioneer, the three-counter requirement to transform is prohibitive — you're spending multiple turns and resources on a land that doesn't produce colored mana, and faster threats make that investment unacceptable in almost every context. Legacy and Vintage are similarly hostile; the card simply isn't powerful enough to compete with the density of interaction and speed those formats demand. Stick to Commander, and specifically to decks that already want a sacrifice outlet built into their mana base.