I think it has more of a weird, alien turtle vibe now.
I'm imagining them to be at least as big as a Hill Giant and they move like the White Apes in John Carter.
Mostly a melee combatant for sure. But limited teleportation and plane shifting... perhaps some sort of intangibility or phasing power too.
I may update the art again. LoL. I still have two days to ponder.