The beholders are a race with high magical affinity, and the stronger ones have terrifying magic contained in their eyes that would end a person's life once if they were to use it. The thing with this situation was that Victor was unsure what the magic contained in the eyes were. If this happened to be a strong beholder, even though it was young, it would still be quite fatal as Victor was nowhere strong enough to face one.
The fact that beholders should be at the level of powerful dragons was already a problem on its own, and if the sense of this world is similar to that of earth, its centre eye would nullify all magic, but this was not earth, and the knowledge from earth doesn't always help here. For one, there were very few people whose powers concerned magic, the majority just had their abilities, and he only possessed skills.
