King's Fall Red Weapon Chest

You are shooting the glowing circle at each of these destinations. It will then create a new plaque displaying the hive rune. If it’s a wrong rune, be sure to shoot the rune to turn it “off” again. If it’s the right one, leave it up. For runes in boss areas, its safer to turn them on after defeating the boss, so they may be unchecked when wiping.

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First: In the pendulum jumping puzzle, jump to the first pendulum and look around to spot this symbol below the ledge you came from.
Second: After you get the first secret chest (right after you finish the tombship puzzle by standing on the plates), look above the door where the secret chest is to shoot this one. After you’ve cleared the barrier on the tombship, you can also try to reach the ledge on the right to find it.
Third: After completing the Totems encounter, head to the room on the left (from the spawn) and look for this symbol on a ledge. Standing on the nearby platforms helps you get a better view of it.
Fourth: In the Warpriest encounter, go up the stairs on the right side to find a ledge with this symbol on the wall on the right of the door.
Fifth: After jumping past the last hole in Golgoroth's Cellar, turn around to find this symbol on the hole.
Sixth: In the Golgoroth boss area, jump down to the ground (where the blights fall) and look to your left to find a hidden room with this symbol on it.
Seventh: In the jumping puzzle after Golgoroth, head to the area with the third hidden chest to find this one on a wall by it.
Eighth: At the end of the jumping puzzle, look above you and on the ceiling of a nearby doorway to spot this symbol.
Ninth: Once you enter the area with the Sisters/Oryx encounters, look behind you and above the doorway to snag the last symbol.

Text copied from Dot Esports article