Horizon Boughs is a common Plane — Pyrulea card from Planechase Anthology Planes (OPCA), collector number 37. Current market price: $5.37, TCGplayer market prices via Scryfall.
All permanents untap during each player's untap step. Whenever chaos ensues, you may search your library for up to three basic land cards, put them onto the battlefield tapped, then shuffle.