exoskeletal strength, speed, and reflexes, manipulate geothermic energies, allowing her to sense heat sources, siphon plasma from tectonic reservoirs, create and direct steaming vapor, cause earthquakes and draw molten lava up to the surface, flight
Heather first became Vindicator in Alpha Flight (1st series) #32, and later changed her name to Guardian in #90. She returned to being Vindicator in Alpha Flight (2nd series) #1.
As of Alpha Flight (3rd series) #12, there were two versions of Vindicator running around -- a past version on Earth, and a present version on Plodex. One was killed on Earth in New Avengers (1st series) #16 but it wasn't clear which one. Five years later, Chaos War: Alpha Flight #1 established the original Alpha Flight returned from space before being killed by the Collective. The past versions were presumably restored to their proper place in history. Vindicator was restored to life in Chaos War #5.