Whereas Arlott saw the scores to be a lucky win for Lucas, Nicholai and the overseer—as well as a few others—saw things differently.
Previously, Lucas had competed in multiple vestige duels. This led to there being a boatload of information about the performance of the brown shield. However, comparing that to the current information, they realised that there was a problem; the two weren't the same.
The brown shield got 484 points in the hardness test, but in the past, it only managed to get 459.
'Is this change brought about by a single metal disc? He didn't make any previous adjustments, now did he?'
Improving a masterpiece wasn't against the rules or anything, but it was easier said than done. Nonetheless, Nicholai felt this was the most likely explanation. He just couldn't believe that a simple metal disc could improve the stats of a vestige by so much, even if one were to consider Lucas' words that the brown shield was previously incomplete.