Kroax said:
My problem is that I wanted to create a large worg of human intelligence, so I sat down and read the rules for anvancement. Here are some things I didn't come across that I wish I had:
- Challenge Rating: How do I normally determine the CR of an advanced creature? Is it the originally HD multiplied with 1 + a tenth of the added HD?
The MM tells you to keep it the same, which is obviously wrong - advanced creatures have more HD and possibly some impressive ability increases. At some point I saw a quick and dirty system from Wizards somewhere - maybe in the MM errata or in Sage Advice? But I would just make a guesstimate based on its new HD.
- Ability Increase: The text seems to only explain which ability scores increases/decreases when you alter their size category. I would like to know how I'm supposed to increase some of the other scores, INT for instance.
Just increase it, the rules in MM only cover how to increase the stats of a creature as it gets more HD. A larger Worg generally isn't any smarter than a reguler-sized one. Remember to adjust the creature's skill points based on its type, HD, and new INT score.
- New CR: How do I determine the CR of the creature with increased INT?
Unless its INT affected its abilities directly (like if it had Wizard levels), it shouldn't affect the CR.
- Class Levels: How can I give this creature some levels in of one of the PHB classes?
Tack'em on top of what the worg already has. It doesn't get the extra skill points that a normal first level character gets, but otherwise it's basically the same as adding a class level to a regular character.
Also, since you're designing this monster as a special NPC, remember that the ability scores in the monster description assume a base of all 10's or 11's - 10 STR, 10 DEX, 10 INT, etc. Don't hesitate to give your villain some real stats! And then apply the racial mods.