Grimskin is a Magic affinity epic from the Ogryn Tribes. Grimskin is a defense-based champion which makes him easier to keep alive, however, his kit is mediocre at best. He has a decrease speed on his A1 which is good against Spider or Fire Knight but the rest of his skills do not compliment this.
Grimskin really needs a buff to his A2 to have a chance to provoke more than 1 enemy. I wouldn’t invest too much time in Grimskin unless you are desperate for a 5th man in your Faction War team, even then I wouldn’t run his masteries and book him!