>The Titan Spawn "sputtered in a voice like crushed glass"
>Implying the Shadow Crystals (which are glass in the Light World) are connected to Titans somehow
>We can Purify the titan spawn with our soul
>Seam will be able to purify the Shadow Crystals into the Pure Crystal
This implies that Titan Spawn can possibly be purified into something else, and that Seam has a power equivalent to our soul to be able to purify the shadow crystals.