Angel - deva

[Spyderbane]

I have a question on this about its Spell resistance.

MM shows it as straight 30, but the code in HL is Hit dice + 18

~ Set up our spell resistance
  var damage as number
  damage = hero.child[Totals].field[tHitDice].value + 18
  #applysr[damage]

I'm curious if there is another book that shows spell resistance based on HD

 

[Tarmor]

The Angels are odd, because the three examples don't follow the same pattern for SR (whether you look at HD or CR) nor the method that is used elsewhere.
Elf, Drow specifically states "Spell resistance equal to 11 + class levels"
In the back of the MM (p300) there's "you’ll probably want to set the resistance number equal to the creature’s CR + 11"
A quick look at a few 3.5 MM's doesn't suggest anything further.

 

[Sendric]

This would have been done a long time ago, but I suspect the general thought process here was to base it off HD so that if a user changed the character's level, the SR would also change as would normally be appropriate. As Dami points out, there isn't a good rule of thumb regarding how this should change. Even within angels, SR seems to be all over the place.