Abaddon heard that the human Soul Master was a Peak Demigod. Thus, when he saw Vaan, he was already 90% certain he was the human Soul Master mentioned to him.
The 10% doubt was due to Vaan's Celestial Dragonwolf form.
Nevertheless, before Vaan was given a chance to respond, he was immediately bombarded with blood and dark spears, each targeting every inch of his body.
In a mere instant, Vaan's body was skewered into a porcupine-like state by hundreds of blood and dark spears.
However, Abaddon didn't feel the slightest relief from killing Vaan as he sensed his attacks meeting little resistance. It didn't feel right, given Vaan's fleshly defense must be far tougher than ordinary human flesh. In fact, it felt like stabbing the surface of a water body.
It didn't take long before he got his answer.
The porcupine-like Vaan deformed, losing resemblance to a living being as it turned into a large puddle of clear water on the ground.