A thought....

[Krishnath]

If you think that's bad, try this:

Base Creature: Great Wyrm Shadow Dragon (CR 23)

First Template: Half-Fiend (CR +2)

Second Template: Half-Golem: Brass (CR +4)

Making a: Half-Brass Golem Half-Fiend Great Wyrm Shadow Dragon

Total CR: 29

 

[Ferret]

Wow. That makes sense. Yay!