Well, the shore is pretty damn old. Spider was probably the talker and siviks the doer. Siviks probably lost his marbles at some point if you read the lore. From the sounds of it, Spider cares about his brother, but could not hold anymore sympathy after one of siviks main point in his chaos was to screw over his brother. I’m guessing it’s a big brother who tried taking care of his little brother and little brother was trash. Just think of what Spider could do if he had his legs still. Probably nothing but be lazy still.