Obviously, this is a bad match up for Groven. Not unbeatable, but very difficult. Belnir has higher starting mana, more health over the course of the match and can semi-counter Groven's most powerful skill but removing a corpse before it can be returned to his hand, or just not even leaving one!
As a Groven player, a bad match up isn't what I'm complaining about. It's that Belnir is currently the most played T2 hero (or at least feels like it). So what can I do to increase my odds? What are the anti Belnir cards?