Why pursue a larger shadow? Clearly, they all disappear as soon as the sun sets. Uncertain about the existence of a soul or the meaning of being, yet whenever the rotation begins, footsteps unconsciously move forward. Who is ahead and who is behind, interpretations vary.
A small part within the hippocampus contains remarkably strong elements. If it can't be wiped clean, just leave it be. Perhaps one day it will dry up and vanish, as long as you refrain from picking at it along the way, it will probably be fine.