Andrew and the others did not arrive at the scene by accident. Being experts, they could obviously sense the battle from miles away, especially Oliver who is a master-level expert.
If they had wanted to, they could have avoided this path, but the reason they didn't was because the energies they sensed were strange. Although all races in this world control the same energy, which is, aura for experts and divinity for demigods, each race has a special signature.
In other words, even if they have the same energy, the aura or divinity of a human is different from that of an elf, beastman, dwarf, or barbarian. It was because of this that Andrew and his group sensed the aura of those fighting, and they felt a signature they had never felt before.
They knew what the power signature of elves, barbarians, humans, and Amazons was like, but they had never felt one like that of the blue-haired elves fighting the group of muscled men.
