The sheer power of Jahars block was enough to send a shock wave up Nicoli's arms. He hadn't been expecting something that powerful. His sword hit the the roof-top with a clang, then bounced the short distance as gravity pulled it over the edge. He had been disarmed. Worse, fire lit up that arm as well. Despite the speed at which he retracted the claw Jahar wore on his left hand did little more than scrape the top of his own hand. Still, the pain made it feel as if he had lost a finger. 

Knowledge is what saved Nicoli there. He knew that the weapon had some sort of necromancy enchantment on it. He now had a brief idea of what it did, though with just that minor wound he couldn't be sure, and he wasn't willing to test it either. 

With Jahar watching Nicoli's left hand it would be no surprise when his fingers worked independently and pulled out two variations of a sand like material. It would be no surprise when he threw the sand forward. The two variations were vastly different, one was not sand at all, but crushed glass that if breathed in could literally tear the inside apart, not to mention what could happen if it got in the eyes.

The second powder was much less lethal, but no less important. It was a metal eating rust collected from the inside of a specific creature. The dust would have no effect on Jahars magical weapons, it wasn't powerful enough for that. What it could do with alarming speed is eat away at any buckles or metal fasteners that Jahar wore. Something as simple as a belt-buckle would be eaten away in a few moments of time.

Other than that move Nicoli didn't dare step in weaponless and attack, he'd be chopped down and he knew it. Instead he focused on the other effects that the adrenaline had on his body, increased perception and brain activity. His hands once again darting to his belt as he took a step back defensively, his mind racing with the possible advantages. He'd need to surprise Jahar, catch him of guard...somehow.