When Beowulf comes towards you and tries to attack, hold L2 + Triangle to get around him. When he attacks, hold L2 + Triangle to dodge his attacks. Then, quickly get up and hit him with your weapon. Press this again to roll and dodge his attack. Keep doing this until he is dead. He will also throw fireballs at you, but you can dodge them by rolling. Make sure you do not run into the ring of fire. If you get caught on fire, roll and the fire will go out. Also, watch out for his barbarians. They will sometimes come in and attack you. There are only a few and they are not difficult to defeat. There is also a health shrine and a power-up shrine where you are at, if needed.