They were all B-class monsters or lower. Anonymous didn't want to confirm, but it was likely that this monster was being hunted by goblins. In other words, this goblin's fighting power was an A-class power that could hunt B-class monsters.
But in general, goblins couldn't possibly have that power. If you become a general class, which is a higher goblin species, you can have that much power. However, the general class does not hunt much because it protects the nest. Besides, the goblin pulling the carriage didn't have the characteristics of a general.
The line of mutated goblins like rare and abnormal species will be high. However, if you search for information about such a monster in the Adventurer's Guild, it will come out immediately, but nothing will come out. In this case, it is most likely a new species.