[CRASH] 3rd Summoning of The Poro King Crashes PC

I can't play the Legend of the Poro King because everything crashes when the Poro King is about to be summoned for the third time. It has happened consistently so far. I have no other problems with any other modes. I run Windows 8.1 on a Toshiba laptop and I have never had the game crash like this before. My PC basically froze with a blue screen and had to be restarted.

EDIT: Also, I am using the Legacy Client