Plus, if you are going to spend money on expensive Reserved List cards, you probably want them to be tournament legal, just in case you end up deciding to give Legacy or Vintage a try some day
Now, thats still five mana in total, but the key thing here is that you can flip Vesuvan Shapeshifter face up and face down a lot in a single match, and that means you can always have a copy of the best Creature on the battlefield
Each Jumpstart booster is assigned a theme based on a particular strategy, creature type, or from MTG history
Black is actually pretty good at using artifacts, and Marionette Master is a hell of a finisher
While you can get value from a dead Meloku that was killed with spot removal after you had spare mana he does nothing to give value through mass removal which can also be a pain