Time to pull up those socks, because during the "Grind it Out!" bonus event, from 01-03-2018 to 04-03-2018, there are cool Surprise Boxes at the Second Hand Shop. The boxes each include one item from the new and unique "Grind it Out!" item set as well as another epic item. On top of that, you'll get a nice little boost to your experience bar. So get moving!
Your Hero Zero Team