Twilight is granted a 'gift' from the Queen of Darkness, that gift is a sword. A crimson sword that she must 'use' on her friends to dicover its true potential. What happens when she finds that this sword is changing her, that this sword is making her want to kill ponies for it to become full power. Will Twilight hold out and beat the sword, or shall she lose against it and kill everypony she loves…