At the same time that Osric and Tritus were battling each other, Kyran had already arrived below the center of the fiery ball. It took him some time to reach his destination because he did not use the Dragon Steps to move.
He did not use it to avoid showing all his cards to Osric, in case the latter still kept a close watch on him using his magic sense.
If Tritus fell short of obtaining the upper hand against Osric, Kyran could instantly come to his rescue. Though he could also achieve this using his warp ability, there was no telling if Osric had a way of countering it.
Osric was a person born in the Chaos Era, and the possibility of him possessing items that could counter Void magic was there. In any case, if such things were really available, they probably could not mass produce them. Such an item would definitely be rare.
