I searched but I think what I need wasn't done yet. I'm still new at source programming and was trying to do this command without sucess. What I need is an script_command that, when you put 2 characters ids(if work with mob unique ids will be even better), those 2 players or 2 mobs start to identify each other as enemy and became able to attack, even if they were from the same guild and group. A little bit like the @duel.