Tiral of the Sekhemas [LV3] Z-Axis

I'm a DeadEye.

When I was in the chamber to battle the Scorpion, and at the moment half of my body was in the sand, I was not able to do damage to it....Many of my cast didn't work.

Not sure if this is a bug or something, and I'm suspecting the Lighting Rods I cast were not at the same plane as the Scorpion was. [Problem with the Z-Axis ?]