Can someone help me find this novel I only remembered one of the arcs. If I'm not mistaken the mc doesn't have any system and in this arc the mc wear the body in the middle of war and in the act of betraying the army but actually the original body was controlled using poison and later use the antidote of the poison to poach other spies to mc's side I've been looking for it all week and I'm going crazy for not remembering it Any idea what novel it is?