Things got worse

Things definitely got worse. Once the Heart-Eater had once again regained his more familiar, demonic form, he did not stop transforming. 

His legs fused together, becoming one seamless entity that was covered in glistening emerald scales which elongated outwards, before curling beneath him. In just a few seconds, from the waist down his body had morphed themselves into a five metre long serpentine tail.

At the very tip of this tail was a long, needle thin spike that had razor sharp edges on either side, like the blade of a rapier. The blade glinted wickedly in the sunlight as the serpentine body curled beneath himself to brandish his new weapon. 

His ribs cracked and began to visibly shift beneath his skin, shifting it as they rearranged themselves to fit his new twisted form, before erupting through his crimson skin on the sides of his torso, just below the arms.