Gigantification

Gigantification is a common-tier, transformation-type quirk which allows the user to temporarily increase his/her size, reducing damage and knockback dealt to them when they are in their giant form.

Unlike most transformation type quirks, Gigantification does not seem to canonically have a time limit on how long a user can stay in their giant form.

Trivia

 * This quirk is used by Yu Takeyama/The current No.23 Hero Mount Lady in the anime/manga Boku No Hero Academia/My Hero Academia.