Dark Phoenix!

One of the most powerful mutants an the Marvel Universe!

Jean Grey - or the Phoenix!!
To begin - she was know as Marvel Gil! That is with the X-Men!
Eventually she matured and got in romantically issues with Scott Summons ( Cyclops!))
Then something strange happened!! Some all powerfull entity called The Phoenix - obtained Jeans body! And managed some vey cool powers!!
All of her current mutant abilites had been umped massively!!

For a time it was really cool - but eventually the power went too far!! Jean went a bit nutty and she started killing people - eventually turned into Dark Phoenix!!
Went off to the Universe destroying planets and people at the same time!!
Thus - the other aliens didn't like that and killed her!
(With a big fight with the XMen and others!)

But - can omniputent being really die??!