~ About six months ago ~
When Nimrod decided to stay behind as Rachel and the others returned to Sylar to face the Four Fiends, he got a free ride on the airship all around the Eastern Continent. He remembered what the djinn had told him over a year ago ("The question I sense deep in your heart... You want to know if you can be your old self again. The answer is Yes. You can. The nectar of the gods will make you whole, if you can find it, that is.")
He spent months flying around the eastern side of the Arkana, hoping to find a clue as to where the nectar was. In five months, he got no closer to finding it. Then one day, he arrived in the city called Kally. He didn't have high hopes at this point, but if there was a place where someone would know about the nectar, it had to be in Kally, the most scholastic city in the East.