The Doctor's Childhood Barn is a common Plane — Gallifrey card from Doctor Who (WHO), collector number 579. Current market price: $0.28, TCGplayer market prices via Scryfall.
Creatures enter tapped. Whenever chaos ensues, for each opponent, choose up to one target nonland permanent that opponent controls. Untap those permanents. They phase out. They can't phase in for as long as The Doctor's Childhood Barn remains face up. When a player planeswalks, those permanents phase in.