Hello
My party took an unexpected action last session and I am considering throwing a REVENANT at them (Bestiary 2, p235). My dilemma is that the monster fits their actions to a T but they are a party of 11th level pcs. The creature in the book is a CR6. Can I advance it using the simple advancement template and just notch it up 4 or 5 CR's to get it to a challenging level for the party?
Or are the advancement rules taking into account the maximum level a monster can attain?
Thank you
CC
