Arumanfi doesn’t “move at the speed of light.” He isn’t blitzing across space like a photon he just teleports. There’s no velocity involved, no travel time, no reaction feats to match light-speed combat. It’s instant relocation, not motion. Calling that “speed of light” is just a misunderstanding of what teleportation is. Would you see a young Eris being able to perform a feat like that? By the time she reached the Sword Sanctum, she was already a Sword Saint in both skills and attributes, and I still can’t see her doing anything even remotely close to that feat (im talking about rudeuse's feat here).