Beyond that I'd focus on picking up powerful staples, like Vampiric Tutor, Demonic Tutor, and Diabolic Intent swapping in for weaker tutors, and Cyclonic Rift for that sweet one-sided wipe
Its eminence ability is well-needed, as the Dragon tribe has a very high average cmc and can use the mana reduction
Now, your opponents can respond to you paying six energy, but given you can do this at any time, you can choose when the best moment is to cash it in
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That doesn't sound like a big difference at first glance, but getting your engine online a turn faster can often have an enormous snowball effect in Commander
This deck works by using his unique abilities to take advantage of all of your spells
