At this weekend's Comic-Con Experience 2017 in Sao Paulo, Brazil, a new teaser trailer for The New Mutants was shown to those in attendance and the sooner it finds its way online, the better! Many fans were disappointed by the lack of mutant powers on display in the first teaser but it definitely sounds like this footage more than makes up for that, specifically in regards to Anya Taylor-Joy's Magik.
Things kick off with each of the movie's leads - Magik, Mirage, Sunspot, Wolfsbane, and Cannonball - all being forced to take a lie detector test before deciding to play a game with each other to get to know each other and their respective abilities (each is reluctant to discuss their past, though).
Magik, however, is quite the rebel and decides to be the first to contribute to this game, revealing that her mutant power has, "Killed eighteen men. One by one." We then cut to a scene of Magik's arm covering itself in metal - similar to what happens with her brother Colossus - before her sword then appears and is covered in a blue flame. That's Magik's soul armour and the weapon is her Soulsword.
This points to The New Mutants sticking to the comic books in terms of how the character's powers are portrayed and that sword come in handy when she battles The Demon Bear with her fellow mutants.