The Red Phoenix Sword can be used, that's true, but it has no skills and the chance of using the Red Phoenix Soul Eater to kill the frozen ghost is also reduced
It is recommended to purchase the model. drawings and do it yourself, otherwise it will also cost 300w (price in Shanghai District 2). The design drawing is more expensive (80~90w), but it requires more materials
If you are a red dog. You can use the ultimate sword 60 (only if you bring it, you will know its effect, which is equivalent to double damage. Killing is also acceptable.) If Devil May Cry really doesn't work, you can use the short 55 Ss which will be published soon. (Gernandis can change it later to increase Dark Force and Independence.) If you are blind, you can use the soon-to-be-released Ice Knife and Fire Knife (but they are not as good as without shadow)