Instant
"Don't be worried." The elder smiled. "This is actually good news. Who would lay an array formation down to protect nothing?"
Fuoco collected himself and nodded with a smile.
The greatest danger of formations was that even seeing them was difficult. The best Formation Masters were adept at concealing the arrays they made. Unless one had high attainments in the Mental Realm or special ocular techniques, it was impossible to see the form of a formation. For all intents and purposes, they were invisible.
Still, for this Twelfth Elder to notice didn't necessarily mean that he had such abilities. Though Formations were hidden from the eyes, it was near impossible to hide their qi fluctuations. Any astute or wizened cultivator would be capable of sensing these minor fluctuations as this elder had.
"How do we proceed forward then, Twelfth Elder?"
"There's no choice. Neither you or I are Formation Masters, so we can only use force."