With Zurork explaining in detail about what he saw when Matthew was still invisible, including the blurry invisible silhouette and the feeling of dense aura gathered in one place, Matthew got a clearer picture of the reason why his presence was detected when he was using his chameleon's aura ability.
"I see… That makes complete sense. If a huge amount of aura is gathered, then you will surely notice it even though the aura is transparent due to your high aura sensitivity." Matthew muttered while holding his chin with one hand while the other was holding onto his elbow.