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But its also full of creative inspiration in the form of sample decklists and content

How do I know which sets are legal

In theory, you could play Invasion of Xerex to bounce something, use Yorion to blink the battlefield, and then use the battle to bounce Yorion, Sky Nomad, which would essentially let you blink your entire board each turn if you had enough mana

Making it a Level 3 Tuner will most likely backfire since Morphtronics already have Scopen (who is basically "Normal Summon Burei/BRD/PTD hurr durr") and Remoten (who can search other Morphtronics in obscure ways)

You can use these tokens as fodder for its partner cat to help you push damage through