The Bandit

After warping, you'll find yourself surrounded by beetles! Take them down however you wish, though now may be a good time to try out your Will power in an offensive manner. Climb down the spiraling path, but turn left at the base and circle the mountain to find a chest. Now follow the glowing path leading to Bowserstone. Unfortunately, it seems the road has been blocked because of a bandit roaming around. If you kill him, you'll be able to enter the town.

Go to Thag's Camp

Follow the glowing trail to find the camp, where you'll be ambushed by numerous bandits. Because the bandits are only equipped with swords, keep your distance and hammer them with whatever projectiles you have (whether it be the crossbow or magic). If you happen to have Shock, you'll find it can stun your foes, allowing you to narrow your focus to just those standing.

Once you've defeated the bandits, Thag will emerge from his abode and challenge you to a duel. Although stronger than his minions, he's quite slow, meaning projectiles are again effective. Although if you see an opening, a few sword strikes may be all it takes to defeat him.