The advancement from one tier to another was referred to as an ascension for a reason. The world was created by the gods. Each pantheon, sect, or kingdom had its own myths and beliefs as to which god made their existence possible, but they all shared the same power system.
The Mythos Ascension System.
The system explained everything due to how they were named and represented. It began with Tier 1: Mortal, then Tier 2: Blessed. This was an ascension from a mortal, literally, to a favored being by the gods. One had the power to control elements, concepts that are deemed to be for the gods alone, but through their benevolence, they allowed mortals to use them, albeit on a lower level. But the requirement to use this power was to ascend to a favored being, blessed by the gods. That was why Tier 2 was named Blessed.
The rest of the tiers followed, each one bearing titles that spoke of ascension. Ascension to a higher being. The more you ascended, the less you became a mortal.
