In order to find the sword called ravensword first collect all Raven stones, then go to south aven, then find the statue in south aven. If you go on the circle below the statues feet it will open. Then walk down the stairs, then you will see a sword pick it up. Then you will realize you found the ultimate, legendary sword the ravensword then go to archamage he will open a portal kill the man that came out of the portal then go in the portal, kill all enemies then go to top to kill your last enemy kill him and return from portal, run out of tower of archamage then it will fall apart.