A clue scroll (master) is the highest tier clue scroll in the Treasure Trails Distraction and Diversion, in which a player follows a series of clues leading towards buried treasure. They are obtained by opening a sealed clue scroll (master). Master clue trails are between 6 to 8 clues long (5 to 7 with the Totem of Treasure).[1]
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Master clue scroll display - OSRS Wiki
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Clueless scroll - OSRS Wiki
My Arm, Old School RuneScape Wiki