Advanced Monster Challenge Rating

When adding class levels to a creature with 1 or less HD, you advance the creature like a character. Otherwise, use the following guidelines.

• Adding Class Levels
  • Associated Class Levels
  • Nonassociated Class Levels
• Adding Hit Dice
• Increasing Size
• Adding Special Abilities

This material is Open Game Content, and is licensed for public use under the terms of the Open Game License v1.0a.