I actually do have some concepts.
Following the base pattern of Shadow milks design, an amalgamation design needs, 1 arm with the colors and patterns of their ancient counterpart, with the opposite arm having the colors and patterns of the Beast who has become the amalgamation, turned up to 11.
Not to mention, they need to look unstable, as if the only thing holding them together is nothing but power and the voices of the ones they absorbed.
For Mystic Flour, her hair extends wildly, the ends of each hair reshaped into a hand, each one a chaotic mess of colors and shapes endlessly curving outward, wrapping around all timelines until she looks like a sentient spider web, her left arm is mainly a white arm resembling a dragons arm, with sharp mismatched white and purple claws and Cacao-esque patterns in light purple all across the arm. Her other arm looks as if it is thousands of silken threads wrapping around each other into the form of an arm, her face a demonic visage of antipathy, with her right eye inverting to become white with a black slit down the middle. (Don't really have any idea on what to do with the legs other than glowing white and black arm shaped markings flowing downward to her feet.)
For Burning Spice, his right arm now a metallic teal looking as if it's covered or made out of orange gold bird wings with metallic teal claws at the end, his other arm, a black and red hulking Mass with sharp horn like protrusions bursting out of the sides with massive black and red claws. sprawling from his back are three more arms, one pink and white with heart symbols covering it, holding a harp now repurposed into the shape of a bow l, one becoming pale white with Black diamond outlines covering it, holding a repurposed lotus now in the shape of a spear, and one mainly black with blue symbols in the shape of... What I can only guess to be an upside down ice cream cone? Holding a repurposed staff now in the shape of an axe. His hair now a black and red void, bladed sharp edges. His legs, now in the shape of a centipede body, are covered in chaotic patterns of color and shapes with a Massive and red triangle shape right in the middle of the centipede body.
For Eternal Sugar, her wings have become black and light pink, pointed bat wings with pink jagged blades at the ends, with fanged mouths of various ships and colors covering both her wings and body, her left arm seemingly covered in a gauntlet of rose red metal, with rose gold patterns in the shape of the Hollyberry Kingdoms patterns covering it. Her right arm, now a wispy black with demonic vibrant pink maws covering it. Her face now it's a demented twisted smile of absolute chaos with joy filled eyes, at the center of her chest now a ginormous pink Maw with a pink upside down heart inside. (Similar to mystic flour I don't exactly know what to do with the legs, maybe similar to a biblically accurate angel replace them with wings or make them made of wings? Idrk)
And I don't really have a concrete design for silent salt at the moment, the only thing I know is that I would like it if his helmet shattered apart, literally exploded off of his head with giant salt crystals in the shape of upward pointing horns protruding outward from his head.
But these are just my ideas on possible designs any artist can go crazy with them, I'm just really curious on what those could look like.
