You are going to want to have the six Energy already when you cast this
The Ur-Dragon is the quintessential dragon commander, making your dragons cost 1 less even from the command zone while allowing you to play any color of dragons in your EDH deck
Merlin, Intellectual Visionary Merlin, Intellectual Visionary , is a card that embodies wisdom and foresight

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Creativity is what fuels Universes Beyond and justifies its stark break from the reality of Magic, but if Wizards is just going to throw random characters people like onto cards, without any strong creative vision, just because they know people will buy it, then Im afraid to say UB has already run its course