The pick-a-template decision tree Start here
Were looking at its cover, which bears a symbol featuring all ten guild symbols, something like the one seen on [reference to style guide]

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If you really want to use Mewtwo, though, this is definitely the way to go
It also strips out many lands from your deck, and over a few turns, it dramatically reduces your chances of drawing a land, thus increasing card quality from the rest of your deck
With Barbarian Class out you have two chances at this