Time 

As he began his meditation at the fountain of life, Minos felt his fatigue from the earlier battle fade away as his muscles relaxed and regenerated with great speed and efficiency.

The essence in the marrow of his bones, which currently contained a large amount of immortal energy, was stimulated after he started meditating, something that was hard to come by when he wasn't trying to use his innate ability or one of his seals on the giant bones.

This liquid seems to stimulate deeper and denser natural laws, similar to those of Panvuter. Minos thought to himself, amazed by the effects of the Tree of Life's fountain.

There was a big difference between the laws available in Panvuter and what was in that place on Elves Island. Still, the spiritual density there was the best he had ever seen in this world, and it could stimulate what he had already achieved through years of hard work.