B'zim was a dragonrider at Ista Weyr late in the Second Interval.
At one point, B'zim and the rest of wingleader J'lantir's wing went missing for a week, never explaining where they had gone or what they had done.
B'zim and the rest of the wing were approached by a future version of J'lantir, who ordered them to collect fruit from the Southern Continent and bring it to his time. He would not tell them why, since it was in their future. It was later learned that the fruit was used to help the Holds recover from the flu pandemic.