While the more expensive variants come with extra goodies, such as Brokers Confluence , which can counter the madness trigger, and either proliferate or phase creatures out
You can't know what decks will end up at the top of the metagame, but it's for certain that the overwhelming majority of them will be using dual lands
The other high prices look like supply issues
Despite the game's serious themes and story, it still retains some of that classic Final Fantasy shine that's translated well to the Tidus' card art
Since the Doctor is inherently large depending on the token count, you can even do things like blinking him to get his enters-the-battlefield trigger again and have him stand at the ready for blocking duty if need be
It's a shame that Arcbound critters don't all share a type , otherwise Metallic Mimic would single-handedly birth a new competitive archetype