Addendum

And Artifact, but you know. We all know.

Unbeatable Idea for the Next Yu-Gi-Oh Archetype

Summer Skull. Think about it. More importantly, think about a mobile game that isn't a simulator, and also it's a crossover game with every trading card game, and it's a gacha. Tower defense? Maybe.

Addendum

The secret is that I just wanted to roll out "thaumatocracy."

Against Thaumatocracy

Given that being capable of magic is better than being incapable, what are some reasons mages might not be in charge?

- There aren't enough of them
-- It requires innate talent which few have
-- It takes too long to learn
-- They keep dying
-- Numbers are limited by the need for some external resource. For example a mage has to bathe in dragon's blood or make a contract with a manticore
- There are too many of them. Being a mage isn't a big deal, and hiring some is less of one.
- Magic isn't that good
- The kinds of people who learn magic are bad at maintaining political power
-- They're too busy with magical studies
-- Magic is linked to certain characteristics such as lack of ambition or gullibility
-- Magic alters mages, for example removing the need for food and replacing it with an insatiable urge to visit places of power
-- Magical expenditure requires long periods of isolation or hibernation
- The kinds of people who learn magic don't want to maintain political power
-- Magical talent isn't hereditary. Ensuring your family will be passed over for some genius discovered in a village is distasteful.
- The kinds of people who learn magic can't maintain political power
-- The gods who give them power forbid it
-- The terms of their contracts forbid it
-- The dragons who rule the world forbid it, and they do check regularly
-- Magic circulates through the bonds between people, so that the more subordinates one has, the more his magic is divided among them - The rulers are capable of preventing it
-- They aren't mages, but they have magic
--- Divine sanction
--- The approval of the land itself
--- Contracts with manticores
--- A store of artifacts
--- Hereditary talents
--- They're the source of magic
-- They're above magic
--- Gods rule directly
--- Dragons/manticores/basilisks etc. rule directly
--- Aliens rule directly (they came to research magic)

There are a few reasons. As for how mages might become an oppressed minority, they can't, cut that out, your allegory stinks.

Addendum

By good reason, I mean the villain is looking for some ancient artifact that will make him absolutely shredded. Whether he gets it and the hero has to fight him at full power, the hero gets it, or some underling gets it to become the true main villain I leave up to you.