Spider paw mention reminds me of my headcanons for gru8 scars. I draw them as like. Really tiny arms (pretty common I think) of whatever arthropod the troll most correl8s to. So Serkets get 3 gru8 scars (I consider the arms pedipalps) in a tarantula arm shape 8ecause that makes 4 legs, Vantases get 6 (cra8s have 10 legs which I'm pretty sure includes the claws), and everyone else more or less gets 1 pair (insects having 6 legs and 4 of them already accounted for.)