Sorry to repeat what a lot of people have said, but it's REALLY annoying.
I send my 20 goblins and Simon the mage, so simon can stay behind and whoop everythings ass while my goblins took the hits.
I thought level three goblins would stand a chance, but apparently not.
Simon was left alone (only like 300 health....) against a yeti, a hero, and one of those fire makers.
screwed up my WHOLE strategy for that game >:(