It would be impossible for him to have the breastplate as Kerafym has only been killed by 2 guilds. Once by Crimson Tempest and twice by Triality both from the Maelin Server. Those kills were in the last 2 weeks. Also most of the equipment is from Crysallos raid zone and the best augments in game. I know for a fact his guild is not in Crysallos and he has not been guilded with any of the guilds who are raiding Crysallos