As the Elder found a trace of Ghost Qi, he smirked. He was the Elder of the Burfuna Ju Clan. As in charge of the city's western district, he was well-versed with the place. So, he could immediately glean the way the people behind the attack traversed under the watchful eyes of the guards that constantly patrolled their city.
'I should investigate the waterways next.' Thinking as such, he landed on a building, focusing on the water tank before him. The water in it contained a thin density of Water Qi. But shrouded within was Ghost Qi, three sources at that.
It was like smoke, spewing as it formed a thin line, heading towards the centre of the city. The line was too thin, and only when a Harmoniser came in contact with it while activating his/her Elemental Qi perception, they would notice the thin blank space.