Arachnidian

While Shadefall is a land of eternal darkness, it still casts a shadow below it. The caverns below that wreched place have never seen sunlight and thus have cumulated even deeper shadows. For many, that kind of void would be blinding. For those that call it home it's comforting. These tunnels are dominated by all sorts of arachnid creatures, although other creatures live there as well. Those other creatures chose to start living there and for that the caverns 'blessed' them. It gave some skin as sticky as a web, while others others were granted extra pairs of eyes so that they could pierce the darkness. There are legends of 'Arachnidians' that have gained a sight beyond sight.

The Spider's Kiss

You have 15ft climbing speed and can move up, down, and across vertical surfaces and upside down along ceilings, while leaving your hands free. Furthermore you have advanced sight. You can feel the vibrations of movement in a radius of 10 ft and can see in the dark in shades of gray up to 120ft. This sight also pierces weaker magical darkness.

Abyssmal embrace

You lose your climbing speed on wet surfaces. 

Advanced Sunlight Sensitivity

While in sunlight, you have disadvantage on attack rolls and saving throws, as well as on Wisdom (Perception) checks that rely on sight.