How did Krix intercept that many stones with the single chain while also simultaneously altering each stone's trajectory to such a heavy degree [i]without[/i] the stones incurring a sever loss in velocity during the process? I could see him blocking the things, but flinging them back at a completely new target like that comes off as very strange. 

Additionally, is there a maximum and/or minimum radius his stone-manipulating/stone sensory powers can function at, or is it unlimited?