I registered to tell you this story: how I humiliated Iron Legacy with the cheapest of tactics imaginable, accidentally.
I decided I wanted to see how Iron Legacy played, having heard horror stories, and being a glutton for punishment assembled a randomly chosen team of 4 heroes to solo-game him: The Scholar, Omnitron-X, Fanatic, and Bunker: Engine Of War. And I thought, that could be worse! Some tanks, some damage, some ongoing destruction. Then Iron Legacy took a turn or two and I was all "[EXPLETIVE REDACTED]". Things were bad. I managed some amazing draws to get rid of all of Iron Legacy's ongoings except for two Galvanizes, but he was still packing 5 damage punches a turn on top of his cards which were wiping the hero hands and boards. The Scholar bought a turn with Offensive Transmutation, which deals 2 damage to a target and makes them unable to deal damage until the start of the Scholar's next turn... and when that was over, Iron Legacy killed Bunker and Fanatic with a wave of his hand.
And then, looking at the incapcitated heros' abilities, I was like "Huh."
Bunker used incapacitated power to put Offensive Transmutation back on top of the Scholar's library.
Iron Legacy went, and got the remaining heros down to under five hit points each.
The Scholar went, played some stuff I don't recall, healed a little, and drew Offensive Transmutation.
Omnitron-X cowered, pretty much.
And then Incapicated Fanatic let the Scholar play Offensive Transmutation from his hand... followed by Bunker retrieving it again.
Basically, by freak chance, I had happened onto a way to lock down Iron Legacy's damage dealing capabilities almost entirely. Rooftop Combat locked down the environment deck as long as I didn't deal more than 10 damage a turn, and once Iron Legacy couldn't deal his massive damage to everyone, Omnitron-X could slowly build up his power base until his components were hitting Iron Legacy for 6 irreducable damage a turn, just enough to beat his healing. The Scholar mostly just drew two cards a turn to keep the combo going, only occasionally playing the other cards in his hand, and slowly but surely Iron Legacy was whittled down to a point where Omnitron-X could self-sabotage and finish him off.
Let me just say I'm thankful I can cross THAT one off the achievements list.