>Ralsei's room is at the end of the "Final Boss of the Darkworld" hallway, implying he could be an encounter in the future
>After chapter 4's shadow Crystal, Seam says you only need three more
>He's having you collect these artifacts to "make something you'll enjoy"
>Has forbidden knowledge or knowledge on things that can't have happened yet (like gerson having a shadow crystal)
>Was strong enough to seal Jevil
I can't wait to fight Seam after he's turned the crystals into some weapon to try and escape reality alongside ralsei when he inevitably goes full flowey in despair