From Introduction: What this Document is Updated Beasties: This booklet contains updated monsters from the world of Ravenloft, using the 4e D&D rules. New Rules: This booklet also contains new rules for monster weaknesses and new variants for monsters. Modular: Much of this document is designed to be flexible. GMs should allow what they want and ignore what they don’t. What it is Not Replacement: This is in no way a replacement for any of the previous Ravenloft products. At least one version of the Campaign Setting is required, and strongly encouraged. Limited monster descriptions are included for updated monsters so past versions of Ravenloft Monster Compendiums are encouraged.