Vicious Growth's newest boss (lacking proper art and a name btw) offers new types of challenges. It splits up into pieces, all providing unique mechanics.
Down the line this will probably not appear as the second boss you'll face in the game. It's likely more suitable to appear towards the end of a map layout (after 3-5 bosses).
Remember the 5 Ds: Dodge, Dash, Destroy & Don't die!