I'll summarize some of the main points
In the Commander variant, a double-faced card's color identity is determined by the mana costs and mana symbols in the rules text of both faces combined
Under current rules, if a player controls two or more legendary permanents with the same name, that player chooses one of them, and the rest are put into their owners graveyards
One can make creatures effectively unblockable by supplying protection and altering colors, and opponents' removal can be made useless in the same way
While I have been out of comics for a while, the stores I dealt with in the past would never have put as much time and effort into something like this
Its only fitting we get a new massive legendary dragon on Dominaria, and Rith, Liberated Primeval is just that