Triple Entente

If this card is in your opening hand, you may begin the game with it on the battlefield At the beginning of your end step, Mobilize (create X 1/1 colorless Infantry creature tokens named Entente, where X is the number of creatures your opponents control minus the number of creatures you control, plus one. If X is less than zero, X is zero.) Whenever one or more creatures named Entente you control attack, put a +1/+1 counter on each of them.