These guys (one named sensei_ob) that have troll skins have teleported to me, and started turning chests to glass! They went through walls, tried looking in dispensers, (luckily me and ShimmeringCake put ladders on them) and destroyed our chests with heads, turning them to glass. The heads that were in the chests exploded out, and they were also wearing OP diamond chestplate and boots. They wore OP gold pants too, they also held blaze rods, and starting placing glass.
