Summarized: Scratch enters the otherside, quickly makes a pocket dimension [where he can't be affected by Muvani] with mass and a CMC then gives the mass to the CMC and enters it's otherside right before Muvani deletes the pocket dimension then quickly makes a portal to the multiversal void and escapes while the CMC's otherside explodes. Note that his UC doesn't care about the laws of physics anywhere.