Ok For my demon lord I was thinking a half fiend deepspawn (from forgotten realms lost empires book)<br/><br/>The standard deepspawn is 14 hd and CR 10<br/><br/>It can be advanced up to 27 hd while staying huge, and from 28hd up it becomes gargantuan.<br/><br/>Half fiend is +3 Cr<br/><br/>So the current total is CR 13<br/><br/>How much racial HD would I add and what kind of templates vould be fitting: Half farspawn maybe?