Originally Posted by
Temflakes403
All right, so the metaphor in writing here is that:
Shirou's power is to be able to make his own world, where his projections can last as long as he wishes, and are comparable to the real thing, especially with the whole fake/true ordeal. Then, we see Archer fighting against himself with this same world, being an incredibly on the nose metaphor for the autophagic nature of his own ideals. But, its influence on power levels essentially means, whatever he idealizes is something he can copy, not necessarily something he can understand. Now, I don't know if Caliburn itself was a Divine Construct, but that was feasible some way I don't remember the intricacies of. Not only that, Shirou needs a lot of Mana to actually make UBW. Case in point, were he able to idealize Excalibur to a level he could find replicable, even though he didn't understand it, as it is a Divine Construct, and he had enough mana (aka Will, the metaphor is right there), it seems to me it would indeed be possible. Unless there's something in a material book that does the whole copyright strike thing to Divine Constructs the same way it does to Ea.