Deathstroke the Terminator
Those are four characters that can, in a Silver Age legal deck, become Legends. Now, of the two of them, I think that Deathstroke and Barbara Gordon should be legends. Emerald Eye and Luke Cage...probably not. But anyway - this kicks off a series of four articles, trying desperately and failing horrifically to make semi-playable decks around each of these legends.
Let's see how it goes.