Just like how humans grow day by day - for there's just simply no permanent thing in this world, summoned creatures tend to change over time as well.
Carrying the Cursed Blood, for one, is concrete evidence that there has been some sort of alteration in their internal workings. Not only do they start abiding by this universe's way of living, they also get to have multiple enhancements when it comes to their abilities and cognition.
They would begin undergoing a so-called mutation.
"Don't you think it's about time already, though?" Lord Caspar chimed in once more, joining the vociferating mass. The onslaught of ranting then momentarily ceased at this.
"We've been misconstrued and downgraded by those pompous Champions for too long. I understand that we're just taking precautions since the future remains unascertained, but perhaps, it's fate that made this happen. It's probably telling us to stir our stumps already."