Maze's End is a mythic Land card from Dragon's Maze (DGM), collector number 152. Current market price: $1.51 (foil $8.30), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {C}. {3}, {T}, Return this land to its owner's hand: Search your library for a Gate card, put it onto the battlefield, then shuffle. If you control ten or more Gates with different names, you win the game.