There is no such thing as a water meter inspection.
But when Fujisaki Kouta's face changed drastically, realizing something was wrong, the Masked Demons he summoned were already neatly and thoroughly slaughtered. Even more ferocious demons were summoned, such as the Horse-headed Ghost wielding a forty-meter serrated greatsword, a Harmony Soul Demon summoned by the Soul Core Box.
Anyhow, they are fierce and powerful Demon Ghosts, more so than the Masked Demons. Although they appeared for just a moment, the swing of the serrated greatsword blasted away all the Masked Demons, and the Divine Artifacts imprisoned nearby seized the opportunity to revolt.
Even without Gu Mo having to remind them deliberately, they were quite aware of what needed to be done now, as Visakha had already returned with reinforcements, and they sensed the presence of their master, naturally boosting their morale, instantly receiving a morale buff.
