Undrave
Legend
What's so transformative about 'you melee weapon attacks can deal ice, fire or lightning damage' ??I'll be blunt. The way 5e is structured, you're going to need a brand new class for that. A Fighter subclass like the Eldritch Knight doesn't have the room for it. You're talking about something completely different than the usual deal, and Fighter subclasses just aren't that transformative.