Magic Point
The list of options presented before his eyes did make Viktor fall into a very hard decision-making time.
Even with a simple glance, one could tell that a 30% increase in battle power was an extremely helpful boost in any situation, especially if he happened to meet an opponent with high defenses and needed just a little bit more power to deal with it.
However, the option of spirit control is also really enticing in his eyes. An one hour deduction in the duration of the drawback he had to receive after the skill expired would allow Viktor to use the skill more often and subsequently make those stressful battles much easier.
Meanwhile, the last option of spirit pool which would increase the skill's duration by 1 minute before throwing his gaze back to the two options above it. An increase in duration would only give him 60 seconds, which honestly wasn't that much of time in the grand scheme of things.
But after a moment of consideration, Viktor decided to choose "spirit pool"