The DCI, as google tells me, is the governing body behind things like banned cards, restricted cards and the way that the competitive gameplay is governed, and the artwork (done by Maro?) is just a scribbled dude in a blindfold holding a mug of beer tossing darts at cards on a dartboard as a self-deprecating way to show off the "rigorous decision-making process" that the DCI uses to ban a card
Kemba, Kha Regent Scars of Mirrodin introduced us to Kemba, Kha Regent, while Commander Masters gave us two new pieces of card art
You can then cast Walking Ballista for free and use it to win
And it's not like we can ban them all either
Support N means put a +1/+1 counter on each of up to that many target creatures
Niv-Mizzet, Supreme gives the likes of Assassin's Trophy, Boros Charm, and Supreme Verdict a second go around and keep on doing powerful things