Regarding the divine/mana draining of the NPC, this was something I totally forgot and am sorry about and it shall be fixed within next maintenance.
Also, for the event, we were first going to host it in the LMS Arena until we received a PM, as GMInspire said, about buffing other players. As we did not have the time to modify the LMS Arena to remove this problem, we hosted the event in another Arena. Unfortunately, we could not announce anything about it as the forums were down.