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The only reason you'd want to run a commander with less overall power is if it offers unique synergies, but Jared Carthalion doesn't even offer that

Klingon Fury We learned very little about the Klingons during the MTG Weekly stream, with the only real reference being the fact that we have a Klingon Commander precon led by Worf

Prosper allows you to exile the top card of your library at the end of your turn, and you can play that until the end of your next turn

As a result, if you want to draft the set, your best best is likely the $10 phantom drafts (where you don't get to keep the cards you open)

Meld Another Magic: The Gathering mechanic returning for the Final Fantasy crossover is meld

It also provides useful card advantage, and due to the cheap nature of most Bear creatures, it's somewhat easy to fire off a flurry of Bears from the top of your library