From within the World Tree, the Ant Goddess observed this sudden turn of events with narrowed eyes.
"Ashara's seals. They really went all out…"
The Ant Goddess stated before closing her eyes. Of the Four Demon Kings, Ashara was by far the weakest. The reason was simple. While in terms of bloodline, physiques, and cultivation the gap between him and the remaining three wasn't sizeable, one thing set them apart:
Laws.
Of the four Demon Kings, Ashara was the only one that became a Base Law Embodiment, achieving Blood Embodiment since the dawn of times. Meanwhile, Urzul achieved Nether Embodiment while Talroth reached Light Embodiment. As for Dolgron, the Northern and strongest King, he reached War Embodiment.
All three were Higher Laws, thereby making Ashara unable to compete with his peers.