Yes, it was not just one magic that was cast, but instead two. The second magic that was simultaneously cast was hiding behind the first magic circle, cleverly used by his opponent to deceive.
But the sword that he threw, shattered both of the magic circles destroying whatever plan his enemy had in mind.
There was no way, Simon was going to fall for the same trick again. He remembered how he had slammed into an invisible wall when trying to escape the capital when his identity was revealed by that magic.
That barrier magic that covered one fifth of the entire capital should have taken a long time to cast. Even if his opponent had the [Chant Shortening], [Revocation] or [Annulment] there should be at least some indication or the turbulence of mana in the surroundings.
However, Simon had felt no such thing at that time, it was as if the barrier had appeared out of nowhere.