The water isn't good. Soul cancels the spell and dives, calling his scythe back to his hand as he does. He doesn't want to kill the man, but he's not going to stop himself from smacking Jade around.
Moving fast, the scythe swings out as Soul flies at the man's side, blade flashing in the light. He's sacrificing power for the speed to stop this before the programming takes over him completely. The Reaper doesn't know how long he can fight it. But for both their sakes, he hopes it's for a good while yet.