Just think of Grunn, the Lonely King attacking alone with Rafiq on the battlefield: Grunn doubles its power and toughness, gets any exalted triggers, and then gains double strike to smash in for over twenty points of damage
Feral GhoulFeral Ghoul was one of the first cards previewed in the set
Also note that the most common archetype to build around in Commander is artifacts, and here you'll get a free artifact on your turn by attacking as well as when your foe's attack too
But there are also a lot of underwhelming, common-rarity creatures filling it up was anyone asking for a showcase Bulette, Pixie Guide, or Celestial Unicorn
Granted, it has to target something already modified, but at least it isnt limited to once per turn
Blue has some lovely things but they are either all double blue and hard to include or only the kind of thing you play when you are already in those colours rather than being worth splashing for themselves