Cancerous

Cancerous is a Quirk used by Abraham Tumourson.

Ability
Cancerous allows its user to manipulate the growth and structure of cancer-affected cells in their body. This grants them the ability to expand and even create new limbs and appendages. The more heavily afflicted by cancer a body part is the more control they have over its structure

Awakened Form
After awakening, the user gains the ability to gigantify their entire body to incredible sizes. Doing this can cause permanent damage to the user's body, depending on how much they scale themselves up.

Limitations
The user can only expand their body as fast as the cancer cells can reproduce.

Drawbacks
The user's body is constantly dying from cancer, and must use their Quirk to prevent the cancer from killing them. They cannot maintain this while using their Quirk offensively, so overexerting themselves can cause them to succumb to cancer.

Weaknesses
Attacking with extra limbs has roughly the same effect as attacking barehanded. Their Quirk can also be neutralized if they are somehow cured of cancer.

Trivia

 * This Quirk is heavily influenced by the Cancer Cell's abilities in Cells At Work!.