Did you defeat the devil boss, and if so how?
You mean red bull? Just attack him and attack nearest fox dwarf also get more food for healing and just jump on platforms when redbull is flying towards you. On second phase just attack him and try to avoid falling objects (i don't understand how to avoid his dashes so that's why need more food for health)
Not Red Bull, its a boss that changes attack based on how close you are, if close itll attack with a fire sword, if far it'll attack with a whip; then it'll remove its head after taking enough damage and become a flying goat head that drops fire around the room, then will disappear and statues on the end will turn alive and shoot fire balls, and it then repeats.