That one slash from Xia Mao's latest Dragon Slaying Scimitar was enough to bring each and every single Dragon Headed Nian down when they ambushed them. Though in Zi Dan and Jing Yu's perspective, it was quite a bit of exaggeration. Unfortunately, it was indeed something like this when the scene replayed through Xia Mao's head.
Heala had buffed Xia Mao before the start of the battle, giving him speed comparable to Zi Dan even though it lasted for less than half a minute. The boost in speed gave the Blind Cat Cultivator a significant rush of adrenaline, allowing him to pick off the Dragon Headed Nians as many as possible before the boost dissipated into nothingness.