Try guttersnipe with eight or more instants or sorceries (maybe seven). My experiences with him while having a good density of i/s in my deck has been very positive. Two damage is much better than a 1/1 if we’re comparing him to Young Money Millionaire.
I don’t like ftk that much normally, and especially not in power cube. I would cut it and a mountain forRift Bolt and Ghitu Encampment. In the other list I would cut him for Port. Not worried about having 17 mana things because 5 of them have added utility/power over normal mountains.
There are a few playable five drops, too. Thundermaw Hellkite, Zealous Conscripts, and I guess Sarkhan.
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