Surprise...

Seth immediately realized he had the advantage and took that opportunity to try landing a heavy blow on his enemy, but Velgor's figure silently and unceremoniously disappeared, like he was a smooth and illusory shadow. 

From behind his back, Seth felt the presence of a few tentacles coming out of the floor and was forced to bring his weapon down, smiting the floor together with those tentacles. 

Bang! 

While Seth's greatsword was buried underneath, Velgor's body reappeared in the air above him, creating a huge sub-space from where a hundred meters wide hand, completely made of shadows and darkness, appeared. Just after it left that sub-space, it extended all the way towards Seth, trying to smash him down on that destroyed ground. 

It was at those times, that the Shadow Walk came in hand.