I agree that Inkmaster Solia wasn't a very good card, even though I still have it. But going from "If your deck has no duplicates" to "if you are holding a dragon" and changing the orange gem into a blue one AND reducing the mana cost is underselling it a little bit, I think.
I mean, the design suggests a tempo play, which you never really cared about in a Reno deck. Adding a free 5/5 to a Flamestrike, Blizzard or a Kazakus Potion was surprisingly not quite broken enough, when you were constantly playing defensively anyway. Also, the 7 mana cost was a bit akward, since the discount on the spell didn't free up enough mana to do have a crazy turn.
Will this card do better? I don't know. I think with the much easier condition and the lower cost, it might have a chance in a midrange deck. You can play a bit more proactively without the highlander requirement, and keep this card around for a Pyroblast or a Power of Creation. It might even be good enough to simply play it with Conjurer's Calling, transforming a weak 6 mana minion into two (hopefully) better ones.
I hesitate to call it good, but it's definitely worth trying out.
Ya this card feels SUPER OP... the rest of the cards have felt strong to op but this is the first one that I can see getting nerfed: 6 mana 4/4 and pyro... and if its on turn 10 add in a fireball... and you can do it twice... SOOO swingy