The Royal Animator is an awesome class. What didn’t sit well for me was the fact that it was 10 levels and only 5 levels of advancing spellcasting. Just now I took another look at it and noticed this -
Trivial, perhaps, but it makes me wonder if there weren’t other issues with it. Are the saving throws correct?
Caster level is a vital part of creating undead. This class slashes caster level by half. This should be a 7/10 class for advancing spellcasting.
There’s definitely a copy/paste issue there. I only ran one character with the PrC, but used Good Will, Poor Fort and Ref Saves. I also changed requirements from specializing in necromancy to having Spell Focus (Necromancy) since I don’t use specialists in Dark Sun. I kept the Spellcasting as is but added an additional ability at level 1.
Master of the Undead: Your class level is added to your caster level for purposes related to creating and controlling undead.
I also modified two secrets:
Necromantic Specialist: This ability reduces the level requirement necessary to create a specific type of undead through a casting of create undead or create greater undead by 1/2 your class level.
Undead Horde: You can control an additional 2 Hit Die worth of undead per caster level with any necromancy spell. You can take this ability multiple times, each time adding an additional 2 Hit Die worth of undead per caster level.
Undead Horde: You can control an additional 2 Hit Die worth of undead per caster level with any necromancy spell. You can take this ability multiple times, each time adding an additional 2 Hit Die worth of undead per caster level.
That looks the same as the ability from the PrCA2. What am I missing?
Master of the Undead: Your class level is added to your caster level for purposes related to creating and controlling undead.
Good. That might make it worth it, actually.
Necromantic Specialist: This ability reduces the level requirement necessary to create a specific type of undead through a casting of create undead or create greater undead by 1/2 your class level.
That’s a good fix because the lost of 5 caster levels meant that even if the Royal Animator used all of its 5 secrets on that ability, he would still be worse of in terms of what kind of undead he can creat.
I’d like to see your fixes implemented in a revised version, if it ever happens.
I’ve just noticed that the King’s Library feature has a problem too. I think the intention is to get 4 extra spells at every level of the class, not just at the levels where spellcasting increases.
Hmm, you are correct. That’s the same, not sure why I had that marked as modified in my House Rules…
What other house rules did you come up with?
I am rewriting the advanced being rules from Legends of Athas - actually coming up with a completely new implementation.I have been working on it for over a year and hope to publish soon.
Most of my house rules are not in digital form. Lots of paperwork from different years. Everything from using some Pathfinder classes to custom stuff such as the fighter but the Bravery ability having an effect on all mind affecting spells and psionics as well as Fighter bonus feats being changable as a full round action with some exclusions such as those required for a prestige class and changing weapons feats outside of weapon groups.
For advanced beings specifically I used the Athas.org beta as a guideline but had quite a few changes. Most of those I’ve moved into electronic format so I’ll start a thread for those.I did start stealing your metamorphosis seed stuff though, getting it ready for next time 
