A strange third entry seems to have been added to the set item list. The current JP server data has only Ofzeterious and Ofzende on the set item list. Maybe this was added with the latest EP5 update. I can't tell for sure, but when I checked the same set item list a while ago, there wasn't this third item on the list, I suppose.
This Klauz unit is among the latest ones which was introduced in JP server just in September. https://pso2.swiki.jp/index.php?クラースヌーム