I was out killing sorcerers for more golem parts and I had found a legendary bitter warpike thing. I used my golem as a backpack to carry the golem parts and the pike. When a dog attacked me he whipped out the warpike and had that overlayed over the sword and there was a no icon invisible item in his inventory with the description xx_DEV_ITEM_ONLY_xx and the name also has a similar apperance being something like xx_golem_sword_t2_xx or something like that. After the combat phase ended and he went to rest stance he unequiped the pike and took his sword back