Rex, Cyber-HoundRex, Cyber-Hound (Helms 646 Decks, Rank #1,257
Since opponents will kill these things on sight, its good to have multiple cards that can do the same thing
Arnos option to be cast facedown as a disguised creature is fine in an environment with other face down creatures, but it's basically useless if Arno's your Rakdos commander
Her passive ability is one of the best ways to consistently generate energy, even from spells that dont normally generate any
Enchant creature Enchanted creature gets -5/-3
This keeps the initial experience much easier to grasp, while ensuring that the players will learn all of the game by the time they have gotten all the packs.