Awhile back someone posted, either here or on BGG, that his wife had created an uber warrior hero that was decimating the battlefield. I thought I might share my experience playing against my brother in law's hero.
In the first game, he was killed on the first turn by archery. Archers moved into attack range, fired one die, hit and got the critical. Since this was the first time playing with heroes so he was allowed to keep the hero in play. So, the warrior never had a chance to close and was killed with archery again.
Then tonight, we decided to play with a witch's hut. On his first turn he entered the hut and searched. He pulled a trap and sure enough, the warrior was killed. I thought this was kind of funny considering the fear factor of the other post.