Dinosaurs, continuing the trend of dinos/sauruses being the most dangerous enemy type in the game, with high defense and attack, along with being so fast that it's nigh impossible to escape from one without jacking the game speed all the way up.
Demon worms are just as tough, and burrow underground so that you can't throw things or hurl spells at them in advance.
While fleeing from a monster, your speed depends on the game's current speed, but the monster's speed depends on the game's speed when it started chasing you. Thus, you can outrun anything easily by temporarily turning the game speed up.
When meeting Harami in the bazaar at night, offer him some money. He'll refuse to take any because nobody will sell him anything, but you gain honor anyway. Hold the Enter key for a couple minutes, and your honor is maxed for free.