Adagia, Windswept Bastion is a mythic Land — Planet card from Edge of Eternities (EOE), collector number 277. Current market price: $7.55 (foil $8.84), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {W}. Station (Tap another creature you control: Put charge counters equal to its power on this Planet. Station only as a sorcery.) 12+ | {3}{W}, {T}: Create a token that's a copy of target artifact or enchantment you control, except it's legendary. Activate only as a sorcery.