For those of you who have the editor and the example quest (the one that you're given instructions how to make, and get a free copy of) you'll find that the original copy is in troubleshooting mode (unhurtable, no xp for kills or hitting monster). However, you can simply walk out of town, grab a certain club, bash a certain crate and pick up the second crystal and a hefty ammount of experience. This will certainly give you enough experience to gain another level untill your about seventeenth level (I did this once to check) and by the time that you're twenty first level this becomes a pointless exercise, the reward is too small. I'm not sure if this was an intentional loophole but it does exist, beware.

------------------
Balgin, the Dwarf