This card was apparently opened in a Return to Ravnica booster (reminiscent of the Rootbound Defenses, which was opened in a pack of M13). It seems to be Wizard of the Coast’s way of ‘accidentally’ spoiling new cards. It’s kind of cool in my opinion.
Other than that, the card is sure to be a good casual seller. It boost your little army and can give itself a +1/+1 counter by boosting an equal powered creature upon its enter the battlefield trigger.
I know that I’ll definitely be trying to abuse this in limited formats.