What is the one boss battle that has made you absolutely lose your mind? Mine was with Skeletron Prime, I had killed 3 of the arms, and his head was nearly done, when I realized I had around 10-20 health left with potion sickness active. This was the point where a pixie thought it was a good time to jump into the mix and distract me enough for Prime to get one more good hit and kill me. I immediately shut off my phone and didn't touch it for another 2 hours.