Magma (real name Amara Juliana Olivians Aquilla; also known as Alison Crestmere) is a fictional character in the Marvel Comics series New Mutants, also associated with various X-Men-related comics. She was created by author Chris Claremont and artist Bob McLeod, and debuted in New Mutants #8 (October 1983). Like all the other New Mutants, Amara originally appeared as a young mutant aspiring to become a hero. Amara, a mutant with the ability to generate lava, joins the New Mutants and becomes Magma.

Magma, de son nom réel Allison Cerstmer, est un personnage appartenant à l'univers de Marvel Comics. Elle apparait pour la première fois dans New Mutants #8, et est appelée Magma dans le #10.