Does anyone know the rules on increasing spell resistance when advancing monsters by type? For example, a chaos beast normally has SR 15 and 8HD, but does this change like most of the other abilities when you advance it to a large 16HD beast? Or is Spell Resistance one of those things that doesn't change in this case?
SR for advanced creatures
- Thread starter kramis
- Start date
mkletch
First Post
It's pretty clear how things like attack bonus and saves increase w/ hit dice, but not SR. I remember seeing something about it in an eamil or messageboard post from one of the 3E designers, but can't remember where or what it said. My point is that there is some sort of guideline, but it is not easy to reverse engineer.
-Fletch!
-Fletch!
CR doesn't increase
The problem is accroding to the guidelines in the MM the CR doesn't increase when you advance a monster by type. The 16 HD Chaos beast is still CR 7, you just get double the experience for since it has double the HD (see the bottom of MM pg. 14). Actually, it was annoying since this isn't even stated anywhere in the actual rules, just at the bottom of the example.
I've seen three systems for determining SR in the MM, double the HD, add the HD to a base number, and pick a completely aribtrary number which doesn't seem to have much to do with HD.
The problem is accroding to the guidelines in the MM the CR doesn't increase when you advance a monster by type. The 16 HD Chaos beast is still CR 7, you just get double the experience for since it has double the HD (see the bottom of MM pg. 14). Actually, it was annoying since this isn't even stated anywhere in the actual rules, just at the bottom of the example.
I've seen three systems for determining SR in the MM, double the HD, add the HD to a base number, and pick a completely aribtrary number which doesn't seem to have much to do with HD.
Yeoman
First Post
Re: CR doesn't increase
This was fixed in the Monster Manual's errata
p. 14, Replace the Challenge Rating note with:
Each 50% increase to the creature’s original HD increases the CR of a monster by 1. Doubling the HD raises the CR
by 2. Tripling the HD raises the CR by 4.
kramis said:
This was fixed in the Monster Manual's errata
p. 14, Replace the Challenge Rating note with:
Each 50% increase to the creature’s original HD increases the CR of a monster by 1. Doubling the HD raises the CR
by 2. Tripling the HD raises the CR by 4.
Garnfellow
Explorer
SR increases 1 for 1 as CR increases, but this rule is pretty obscure, buried as a footnote in the Monster Manual II. See the example advanced monster (Dune Stalker).
Kae'Yoss
First Post
Chapter 4 of the Monster Manual (3.5) deals with advancing monsters. Table 4-4 on page 294 tells you how to increase CR
(examples: Most monster types increase at +1 per 4 extra HD, animals, magical beasts and monstrous humanoids at +1 /3HD, Dragons, outsiders, and nonassociated class levels +1/2HD/LV, Directly associated class levels +1/level....)
The CR should be CR+11, so an average caster has a 50% chance of penetrating it. You can change that number if the SR is supposed to be overcome easier or harder.
BTW: Damage Reduction values by CR:
0-2 -> none
3-5 -> 5
6-13 -> 10
14-20 -> 15
(examples: Most monster types increase at +1 per 4 extra HD, animals, magical beasts and monstrous humanoids at +1 /3HD, Dragons, outsiders, and nonassociated class levels +1/2HD/LV, Directly associated class levels +1/level....)
The CR should be CR+11, so an average caster has a 50% chance of penetrating it. You can change that number if the SR is supposed to be overcome easier or harder.
BTW: Damage Reduction values by CR:
0-2 -> none
3-5 -> 5
6-13 -> 10
14-20 -> 15
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