Absolutely, and don't - I do apologize for lack of clarity or clear sense on my part! Mentally, I suppose I'd just framed the grounds as blacking out due to injury - getting back up after his health is depleted is a part of his gameplay in canon, but it does canonically happen to him at the very least once. If that's too tenuous, alternatively, stabbing himself with his own sword - but that's a potential and non inevitable occurrence, and in-canon he does it deliberately out of curiosity on what if anything the damage is, as he's already very undead at that point.

And oh dear I've been missing that this entire time. X_X Settled for the future, then, and thank you!