Tomb at the Dragon's Spine

From publisher blurb: While crossing the deadly 'Dragon's Spine' of the island's interior, the party encounters a darkness at the heights. Within the ancient stones the tomb of one of the last sea dwarf master masons rests. Has the corruption of the island reached the tomb? Only exploration will reveal the truth, and the treasure. This mini-adventure sets up certain events of Folio #14, and is for characters levels 1-3 in both 1E and 5E formats.