Witch Board (2004)

When Yu-jin and her new friends are tormented by cruel classmates one too many times, they decide to take matters into their own hands. With a makeshift Ouija Board, they call upon the spirits to place a curse on their tormentors. But little did they know how immediately and thoroughly their request would be filled. Soon the bullies start burning themselves alive! But that's not the end of the story. The spirit that answered their call has been holding a 30-year-old grudge and is looking for payback.