What is a wordless gobbledygook on the journey?

Nonsense, it seems to belong to a guild skill. Take the wordless gobbledygook to Mr. Feng Shui of Wangcheng NPC for identification, and you can learn level 8 skill. In the past, the highest skill only increased by 7 points. I don't know why. My guild is still rubbish. It is used to summon. People's equipment has no skill points, but BB is 10.