This little box could be easily concealed and was capable of detecting all violent incidents within a fifty-meter radius, with no other peeping functions. Compared to traditional malicious detection spells, it boasted greater flexibility and an unbeatable, ultra-low cost.
Enveloping an area in malicious detection magic wasn't hard; in fact, it was far simpler than creating these little devices. However, from a long-term ether consumption perspective, as the area expanded, no matter how refined the spell's consumption became, it couldn't compare to these mass-produced gadgets.
Ansel sat on a bench by the roadside, holding Ravenna in his arms, watching as two drunkards stumbled into an alley.
Before long, the round lamp in Ravenna's hand emitted a glaring red light and started buzzing, simultaneously projecting the scene of the drunkards brawling, with the exact location marked in the center of the image.
