Given the number of Treasure tokens taking over Commander, every time a player wants to spend mana, you can start pinging their life down with Mayhem Devil
At first glance, there doesnt seem to be much difference between this version and the English one
Like this: Mystery Booster is like nothing we've ever done before, and we hope the play experience is fun, exciting, and, yeah, a little bit mysterious
Enchanted creature has "Whenever another creature dies, put a +1/+1 counter on this creature." When enchanted creature dies, look at the top X cards of your library, where X is its power
(2) When an opponents monster declares an attack: You can return this card to the hand, and if you do, negate that attack
You can just add this to your typical "vanilla test" evaluations