You face a 9-headed hydra. Your sword cuts 5 heads in each swipe (never less), which kills a 5-headed hydra, but a larger one will regrow 2 heads after each swipe. Your scythe cuts exactly 7, but 10 grow back if the hydra lives. Can you kill the hydra? Or better to explore to find more arms first?
http://steamcommunity.com/sharedfiles/filedetails/?id=798144393
This release introduces a new playable character race (Atlantean), a new type of special hydra (evolving hydra), a new type of equipment, makes special hydras appear more frequently, and introduces many other improvements and bugfixes.
Read more on the blog: http://zenorogue.blogspot.com/2016/11/hydra-slayer-180.html
Have fun!