After all, in his perception, this so-called Creation Hot Spring is really weak. Even the realm that bears it seems inconsequential in power.
The Divine King originally thought that perhaps the Divine Artifact was deliberately obfuscating itself, not willing to be used by outsiders, but now it seems he might have been overthinking it.
Indeed, a world-ending catastrophe, the Spring of Wisdom might have been destroyed once and for all, and the similarly named Urd Spring probably hasn't fared much better.
As for Heva
[Hvergelmir Spring], Boiling Soup, Unending Spring, Zeus of course had heard of this name.
It is the primal water of the Nine Realms, from which twelve great rivers called Elivagar flow out, and the ancient giant Ymir was born from this source.
Although the Divine Domain of Asgard is lofty and doesn't really regard the Lower Realm of Niflheim, filled with cold and fog, that highly, they still recorded some things related to it.