Butterfly Transformation Gu is a Gu named among the reverse refinement routes for the Four Flavors Liquor Worm.
Butterfly transformation Gu yields the eerie qi butterfly rather than a liquor worm. ch. 212
Form and rank
Chapter 212 does not describe its finished body shape, size, color, or rank.
Effect
That yield is the only outcome chapter 212 states for this Gu. The chapter gives no activation cost, feeding need, or other use outside the reverse refinement talk that lists it. ch. 212
Path
Chapter 212 does not assign butterfly transformation Gu a named cultivation path.