No offence, but

this is one Ugly Helmet, right next to Mag Prime.

looks like a Kett (mass effect andromeda) xd

Very unique helmet for mag, although it looks a little odd on her, needs a bit of work.

Particle colliders are great. that is all.

it would suit trinity more

look like helmet trinity aura

Spoopy-looking. How could I focus on shooting enemies when I am scared of my own character?

Interesting but i wouldnt use it. Im voting up for its original design and the overall structure of it. Its a weird design but im glad it exists, very interesting ^^

looks like a dungeons and dragons beholder and id buy it

... when piercings go too far... JK. I think a particle accelerater is more Nova material than Mag. It looks a bit manly, with a huge Jay Leno chin, and wide profile around where the ears / cheek bones would be. The brackets on the ring look like useless flair, like they're part of a lego set. The overall concept is cool, but could use some refining.

was gonna sketch some suggestions but cant find my tablet pen
i'd suggest making it not so thick, more angular, more futuristic and less like the bolts on steel look
like see how every other frame has random floaty bits try doing something like that

as cool as it looks it does not fit in warframe whatsoever.

Whoa, this looks awesome

Kinda feels like it should be a nova thing, but looks good anyway.