Oasis of Brass

From publisher blurb: In this 5th edition fantasy micro-dungeon, a party of adventurers has discovered a sheet of parchment that appears to be a map to an oasis. Notes scribbled on the paper imply that a powerful magic weapon (possibly a shortsword or longsword) was hidden underground at the location near a well. With some research the party is able to decipher the directions to the well, and glean the proper route to the Oasis of Brass. What puzzles and foes will need to be overcome to find the prize? That's assuming it hasn't already been looted! The module is designed for character levels 3 to 5 and is SRD-compatible.