The island finally exploded when Emodao let go of its binds. Within the materialization he created, the full force of the explosion generated enough power to actually burst the materialization into thin black clouds that were pushed away at the remnant blast. Most of the explosions' power was mitigated by the materialization that swallowed the island; the gust was only a small fraction of its power.
It was only pure wind, but the residue of the abyssal energy made it dangerous. The Qinglong Clan was able to hold the line, but that didn't mean that they were not appalled by the strength of the blast. They were even in awe at the action taken by the Netherworld King. He actually swallowed the island to protect everyone.
