Yd was already in shield form in Nalizar's hand, before Tevarah even stood up. This was good, becuase Nalizar had no time to react to Tevarah's sudden assault.
That throw would have killed most men, was all Nalizar had time to think. Batting away the first sword with Yd, he didn't even see the other one cut a shallow slice in his forearm.
Burning pain. Nalizar didn't know which was worse, a normal sword wound or that of a Shardblade. He grimaced, then rage took over. The pain disappeared, and he continued the fight.
Dancing around Tevarah, he formed Yd into a spear, blocking attack after attack.
Finally, seeing an opening, he stabbed in through his opponent's defenses.