It's rather significant for us, painful too.
Our fictive introject of Emiya Shirou feels that he has successfully recovered the "exo-memory" of Emiya Kiritsugu giving him the lifesaving gift of Avalon, the healing scabbard of Excalibur, the Noble Phantasm and signature weapon of the King of Knights, Arturia Pendragon (as she's summoned in the Fourth Grail War depicted in Fate/Zero).
We can...feel the echo of this. As we type here, we can feel the "phantom" feeling of that moment in our chest.
We're not quite sure yet but we think this means that Shirou—"our" Shirou, that is—might be able to remember something of his life before the Fourth Grail War. Right now his life begins in a wall of fire...I think perhaps some of our readers might have some notion of what that feels like.
It also raises interesting questions about our own personal magical practice that I'll...table for now.
~Chara of Pnictogen