The Core backside of Matzalantli, the Great Door seems more reliably powerful than the Gaea's Cradle backside that is Itlimoc, Cradle of the Sun unless you are in elfball, but its harder to flip and the front side doesnt do quite enough
The advantage of this is, whereas each other (three-colour) deck has only two possible commanders, any of the five legendary creatures in the Necron deck could lead it
Arguably, because the game does such a good job of teaching you how the game works and what you need to do to understand cards you may not recognize, the decks that it comes with dont matter too much, which means you could pick up any of these and play successfully afterwards
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