In December 2007, Balogh heeded the Clave's warning and evacuated to Idris to be safe from Sebastian Morgenstern and his Endarkened army, believing that the move was temporary and for brainstorming their next move.
At the Great Council meeting after the Downworld representatives were abducted and a message, written in angel ichor, was left in the Council Hall by Sebastian, Balogh guessed that the gesture was vengeance for Sebastian's failed attacks on the London Institute and the Adamant Citadel. When discussions of all Shadowhunters hiding out in Idris, where they can remain a group, was brought up, Balogh insisted that they needed to be out there, fulfilling their duties of protecting the world against demons.
During the meeting after the battle dubbed as the Dark War, Balogh was the first one who raised the issue of the half-faerie, half-Shadowhunters Helen and Mark Blackthorn, believing the rumors that they were in fact traitors and in league with the faeries, and that they helped Sebastian easily penetrate the Los Angeles Institute. He questioned their loyalties, despite the objections of the few who stood up for them. He also suggested that Mark be left with the Wild Hunt, and Helen be stripped of her Marks. Instead, Helen was merely exiled to Wrangel Island, though Balogh no longer challenged this and simply agreed.
After the reopening of the Shadowhunter Academy, Balogh visited as a guest lecturer and told the students about Tobias Herondale, whom he and most Shadowhunters (due to the story passed down through their generations) believed to be the perfect example of the worst thing a Shadowhunter can do: betraying his comrades in the heat of battle and being a coward—which Tobias apparently did in 1828 when he disappeared. Balogh horrified the students when he revealed that Tobias's wife was the one who perished for him.
Lazlo is tall, thin and dark-haired.