While exploring the Githyanki Creche, you stumble upon a classroom where the younger soon-to-be warriors are being trained.
One of the Githyanki Youths is being punished for disobeying their Warfare Instructor as they have preferred not to kill another student.
It is here that you may interfere to save Varrl or allow him to die, which may affect how you may obtain a certain Githyanki Disc needed for other quests.
Vaarl Location
Varrl is located around the center of the Classroom in the Githyanki Creche, where you may see him being beaten by the Warfare Instructor.
Once you reach the classroom, you may interact with Varrl or the Warfare Instructor to begin a cutscene where you may intervene.
How To Save Varrl?
Varrl will be put on the spot for not obeying his Warfare Instructor, who wishes that he would kill one of the other Githyanki Youths being trained.
You may intervene by persuading the instructor or may step up and fight the Varrl since he is being forced to fight.
If you have decided to challenge Varrl, you may select to attack him but instead of killing him, you can do a non-lethal attack that looks realistic enough to make him pass out.
Varrl will be moved after he becomes unconscious and you may head to him in order to heal him, which will remove his unconsciousness.
After saving Varrl, he will walk away unless you interact with him, which will begin a cutscene where he will thank you.
This will lead to the option to share about the Githyanki Disc that you have found in the Underdark, if you happened to obtain it. (You can also persuade him to say more)
Varrl ends up sharing the second entry called Orpheus, Prince of the Comet Part II: Sacrifice, which allows you to progress with the Discovery the History of Prince Orpheus quest.
Verdict
Saving Varrl is a good way to prevent one more unnecessary death and makes it much easier to progress with the Discovery the History of Prince Orpheus quest.
Should you fail to save Varrl in any way, you can always take the book/disc from his dead body later after it has been moved.
Obtaining the disc that Youth Varrl has is necessary if you want to collect all 3 to progress with the related quest, which involves Lae’zel at most points.