When you first create a character and give it a name - if you use 9 characters to create the name you will be given 10 points to add to anything you want (Strength, Intelligence, etc...)

Beat the game and at the end of the credits, you will have a choice to save. Save and load your game. Go to the entrance of the prison and talk to the guard. He will ask if your a true adventurer. Select the first option and the monster will becomes stronger than normal. Talk to the guard again and select the 2nd option to return the monsters to normal.