The arrows were fast, and their size didn't affect the speed that they were capable of. They were made of a pure blue light that left a shining trail wherever they flew.
Noah had sensed the danger thanks to his increased awareness, but he had understood its origin only after the arrows appeared. After all, his senses were screaming non-stop due to the many powerful cultivators fighting around him. There was a limit to how accurate his perception could be in that situation.
Also, he wasn't one of the targets of the arrows. They were aiming for the leaders of the factions.
Elder Julia saw the attack and retreated. Each arrow had the power of the peak of the fifth rank, and there were four of them targeting her.
Luckily for the Elder, the arrows didn't seem able to make sharp turns since they only managed to shift their trajectory slightly when she performed an evasive maneuver.