If he advanced without one in each circle, it meant that after advancing to a high-level wizard, Levi would have three fewer innate spells than a perfected Nine Talent Wizard. This would definitely be extremely disadvantageous in a battle with wizards.
The effect of an innate spell was equivalent to a bunch of ordinary spells.
Moreover, the power of innate spells could continuously increase with the advancement of the wizard realm.
Even the innate spells mastered during the third-circle could be useful in Levi's ninth-circle wizard realm.
Without the proficiency panel, Levi might have advanced to the fourth-circle with two innate spells like other wizards in a hurry.
Since there was a cheat, he had to do it perfectly. There could be no regrets. This was Levi's thoughts and attitude.
Of course, the choice of innate spells was the same as the third-circle defensive field. There was no rush.