QUICK INVENT ELECTRICITY
Set fire to the rug.
Run blindly in the direction he was standing in and kick everywhere hoping to hit him.

You blindly run towards where Uviso was standing, even though you clearly saw his glowey eye staff move towards the other side of the room. You hit your foot on the computer interface. Soren transmutes two of his Light Crystals into an arc of electricity, which starts a fire and gives you a bit of light. Uviso isn't happy, and expresses this with several vulgar comments.
SHOOT THE EYE
> use crossbow on eyestaff_
Obviously the eye is glowing, so let's see if we can hit the eye with our crossbow.

You see the staff glowing on the other side of the room, so you start shooting in that direction. Soren fires an arrow, but it misses. You fire two shots with your crossbow, and the Tingallium-Infused Imagination Ingots take their effect on one of the bolts! While your first shot missed, the Tingalium Bolt made contact.

: OW MY EYE!
You must of hit him in the eye. You hear the sound of glass shattering, and Uviso gets REALLY pissed.

Uviso returns fire, shooting a massive Red Beam of burning energy at you and Soren. Soren falls down to the floor to avoid it.

: Hey, Uviso... maybe you shouldn't shoot massive beams of energy from your face. You might further damage the continually weakening structural integrity of the tower...

: You imbecile! You made a HUUUGE mistake when you broke my shade mask!

: Wait... you're wearing a mask? Whats with bad guys and masks?

: MINE IS NECESSARY, OKAY?

: Woah, okay. Sorry man. Sheesh.
While the fire produces some light, it isnt enough to light up the whole room. You can't see hardly anything in this darkness. You need to find a way to turn on the lights.