Ren's plan was simple.
Simply checking everyone's last corner and place within the vault wouldn't work, as the figure could move around.
He had to hit every place at once.
And what better way to do that than by causing an all-out fight?
Spell-blasting everywhere, spears flying around him, sword slashes, and other various weapons all swinging.
And, the main cast would be conscious of their attacks and avoid destroying too many artifacts and weakening the seal, so Ren wouldn't have to worry about the mythical beast escaping.
There was no way that the intruder would be able to dodge every single one of those attacks.
He would have to be hit at least once.
And when that happened, as he became visible again due to taking damage, Ren would be there...ready to reap.
Of course, there was one requirement for that plan.
Ren had to survive until then.
