The key to Affinity is a critical mass of artifacts and this deck boasts 48 including the manlands. The reason why the amount of artifacts is so crucial is because Cranial Plating can turn a simple tiny creature into a one or two shot killing machine as it boosts power for each artifact you control. The army comes from a variety of artifact creatures starting with zero drop in Ornithopter and Memnite which help the deck start the game by emptying as much onto the battlefield as quickly as possible increasing the total artifact count substantially. The decks true one drop is Signal Pest with it team pumping Battle Cry and uniquely evasive ability, but Vault Skirge with it Phyrexian mana cost is most often played as a one drop and can quickly gain back the life lost paying for it. Speaking about pumping the team Steel Overseer is a card that if you are allowed to untap with it on the board can quickly make your army of mites turn into ferocious battle bots quickly. Another strong card is the Arcbound Ravager which carries a lot of history in the Affinity decks. With him able to manipulate the board state and sneak damage through where you opponent left himself defenseless can create an inevitable demise for your enemy. The final creature is Etched Champion which in a land of spot removal and opponents with colored creatures it reigns supreme. Often once you attain Metalcraft with him on board it’s gameover in very few hits. There is also two set of manlands with Blinkmoth Nexus and Inkmoth Nexus, both able to help end the game but Inkmoth with it poison counters pairs up with Cranial Plating very nicely to quickly infest your opponent from the inside out.