Quirk: Overheat
Quirk Type: Transformation
Quirk Class: Strength Enhancement and Temperature
Ability - When the user consumes, hot items or spicy items, their body heats up tremendously compared with the level of spice or heat. The user's body becomes incredibly hot and touching their skin feels like fire. The users strength and speed increases and the steam emitting from them indicates the quirk is active.
Combat Range: Close
Disadvantage/s: - The user gets a saw throat when the quirk runs out.
- The user has a weird interaction with water. Being sprayed with water will turn it into steam but too much will soak the user and deactivate their quirk.
Special Moves: None
Hero/Villain Name ideas: Coalmine, Tang, Scoville
My Input (not necessary): The user I see having a mutated body and alien appearance like Mina Ashido. They would be happy and hyper and bounce around a lot.

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Future Quirk Concepts (2)
FanfictionSecond book on this topic. Just some ideas that can be infused with the would of My Hero Academia. No need to credit as a lot of ideas are no longer original.