This is pretty cool. The tail-hand is awesome =)

it is refered to simply as an "underhand" and when paradise crawlers are born they are either truly "Left handed" or "Right handed". and it is incredibly rare to find a 6-fingered "ambidextrous" paradise crawler.

I want to create other paradise crawlers as well. Have a bunch of ideas. Vah'khere is nicknamed a "Sentient Spear" amongst other crawlers. given they act like a self-guided spear that can track and follow thier target.
They skim across the battlefield and any enemy not paying attention ends up getting skewered as these guys zip across the battlefield

his tail is a hand? :o

Yes, Paradise crawlers, though resembling nagas in many ways, are born with a 3rd hand at the end of thier 'tail' which is refered to as an "underhand" considering they can spread these hands out and balance on them the same way a flamingo stands on one leg. It is a fully working and functioning hand, though pure chance and genetic determine the "proficiency" (whether the hand is a left, or right hand). This hand is large enough to grab a human by the torso, which is good considering if they dont like you..they will grab you, fly up only to divebomb back down and slam you into the ground...or they could just let go of you and give you a "Chance" of survival (which is the same chance of survival you have of skydiving without a parachute)

These underhands can also be used to wield weapons or be used to grab onto ledges or branches. From a distance a Paradise crawler hanging onto a ledge and hidden by its wings is often said to resembled the severed arm of a giant.