He learned a stealth technique known as 'Shadow Camouflage,' which made him get lost in the shadows. The only thing was that this was a tricky technique that required a lot of practice to master. With this addition, his 'stealth combo,' which he had learned by combining different techniques, has become much stronger. If he can integrate this shadow camouflage technique into this combo, he will be able to fool anyone and will be able to escape if he doesn't attack anyone.
His increase in affinity and control in the shadow element also allowed him to enhance the effect of his 'Shadow Walk' skill. He could now use it for five minutes, enough to escape most of the situations. His only regret was that even when he had improved so much, he could still not use powerful skills such as 'Animate Shadow,' 'Shadow Construct," and many more.