Cessily Kincaid(Marvel, Mercury)

Cessily Kincaid is a mutant whose body transformed into non-toxic liquid mercury. She can stretch and mold herself into different forms like weapons. In her liquid form, Cessily is resistant to telepathy, she doesn't have to eat or breathe like humans (because she is no longer an organic life form), she is resistant to magic, her molecules can cling to solid surfaces, and she has enhanced durability of her skin, bone, and muscle. Cessily joins the first team of Emma Frost's Hellions Squad, and she manages to keep her powers after M-Day.