The auxiliary form testing requires Nagna's assistance. Feng Yuan doesn't exactly have a bad relationship with Nagna, and actually, Xiao Ji is good friends with Nagna. However, given the current situation, Feng Yuan has no means to call her over.
Long Boduo could help bring her over, but Nagna's mind is still immature. Even though the chances of a major battle erupting in the vicinity is low right now, Feng Yuan still needs to prepare for the possibility of the Imperial people going crazy.
To call Nagna over now, and for something so trivial, even Feng Yuan feels it's inappropriate.
As for the other offensive attribute forms? Although Long Boduo can provide authorization for Ghost Series attacks, considering it's like a youthful version of the Divine Beast Technique, Feng Yuan feels it's more appropriate to use a different Ghost Series Divine Beast.
After all, apart from Death Series and a few other special attributes, there aren't few Divine Beasts with other attributes.
