Fractal Blade

The Fractal Blade is a Short Sword that appears in Baldur's Gate: Siege of Dragonspear. It can be found in the Ruined Temple after solving Sarevok's mask riddle.

The hallway before the reliquary’s antechamber has six masks on the wall, two rows of three. The description reads:

''Six gigantic domino masks are set into this wall. No eyes peer at you from them, yet you cannot escape the feeling you are being observed.''

Click on the third, first and fourth masks as per the Page from Sarevok's Notes. This will reveal a secret room, containing a Shadow Aspect and a chest with the Fractal Blade.