In-universe Power Levels - How powerful is your favorite champ?
After reading Rioters mention how Malphite is MOUNTAIN-SIZED in-universe, it made me wonder just how many champions are more or less dangerous than their ingame appearance and abilities would suggest. After going through short stories, looking through old league judgments and making a few speculations, I've come up with a tiered list of champions based on "power level".
Tier S
Wielders of vast power on a cosmic scale, difficult for mortals to understand or quantify, nevermind defeat. The fate of whole worlds rests in the hands of beings like these.

Tier A
Immense, timeless power, comparable to catastrophic natural disasters or mythological entities. Capable of changing the face of continents or altering the course of history. Includes creatures not subject to the laws of physics and that most likely cannot be killed as we know it.
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Tier B
Weapon-of-Mass-Destruction powers, capable of crushing armies with minimal effort and potentially leveling whole cities. May or may not be susceptible to conventional forms of attack.
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Tier C
Capable of widescale property damage, paragon combat ability, and/or profound powers to affect their surroundings. With considerable effort, could potentially defend him or herself against an army.
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Tier D Individuals capable of superhuman feats, with the ability to generate supernatural effects, defeat dozens of skilled combatants, and/or destroy buildings. Everyone else not listed
Tier F
Individuals that could defeat one or more skilled combatants given adequate circumstances. Competent, but strictly ordinary.
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Please comment or make suggestions on how you think they line up.

i remember reading he cannot be killed