I'm currently trying to apply the half-fiend template from the Bestiary to a standard Bugbear (CR 2), but am having trouble understanding how additional HP is calculated for the example half-fiend given by the book - the "Half-Fiend Minotaur" (CR 6). The base monster for this example, the Minotaur (CR 4), has the same HD (6D10) as the Half-Fiend Minotaur, which is in line with the rule about not recalculating the monster's HD despite the type change to outsider - but the additional HP modifier for the Minotaur (+12) changes to +24 for the Half-Fiend Minotaur, for HP equal to 6D10 + 24. A Half-Fiend Bugbear would retain its normal 3D8 HD, but does the original HP modifier of +3 increase at all? I'm not quite understanding why in the example given by the book the modifier changes from +12 to +24.
It's coming from the constitution bonus. The Half-Fiend Minotaur has 19 constitution (+4 modifier) while the regular Minotaur has 15 constitution (+2 modifier). This doubles the bonus hit points from constitution from 12 to 24.
It's coming from the constitution bonus. The Half-Fiend Minotaur has 19 constitution (+4 modifier) while the regular Minotaur has 15 constitution (+2 modifier). This doubles the bonus hit points from constitution from 12 to 24.
That makes sense for 10 + 2 = 12 for the regular Minotaur, and 20 + 4 = 24 for the Half-Fiend Minotaur; so how is the +10 and +20 calculated? I was looking in the appendix to see if it was due to additional HP from monster advancement but I can't quite seem to figure it out.
That makes sense for 10 + 2 = 12 for the regular Minotaur, and 20 + 4 = 24 for the Half-Fiend Minotaur; so how is the +10 and +20 calculated?
You multiply the constitution modifier by the number of hit dice to get the number of bonus hit points from constitution. Both have 6 hit dice, so it's 6*2 = 12 for the Minotaur and 6*4 = 24 for the Half-Fiendish Minotaur.
That makes sense for 10 + 2 = 12 for the regular Minotaur, and 20 + 4 = 24 for the Half-Fiend Minotaur; so how is the +10 and +20 calculated?You multiply the constitution modifier by the number of hit dice to get the number of bonus hit points from constitution. Both have 6 hit dice, so it's 6*2 = 12 for the Minotaur and 6*4 = 24 for the Half-Fiendish Minotaur.
Ahh, I wasn't aware of that rule! Is this just something that applies to monsters? I would assume it's consistent across monster types as the Bubbear's bonus HP is +3 (Con modifier of 1 * 3HD = 3), whereas for the Half-Fiend template it would get +9 if I add the +4 ability score bonus to its Con, which is in line with the formulas you have suggested.
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All creatures with a constitution add the con mod per hit dice. If the con mod changes, so does the number of hit points.
The line about not recalculating the HD is referring to the fact outsiders normally have a d10 hd and when you apply the template to a creature with a different sized HD (like a d6 or a d8) not to change it to a d10 even though it's an outsider now.
Right - I realised when I was looking at HD by creature types in the appendix that outsiders have 10HD and that's what that particular line is for.
In regards to adding Con modifiers for every hit dice - what determines bonuses to HP for undead, whom lack Con altogether?
Sorry for all the questions - but I like to understand the rules as in-depth as possible, and everyone has been very helpful with great answers.
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Right - I realised when I was looking at HD by creature types in the appendix that outsiders have 10HD and that's what that particular line is for.
In regards to adding Con modifiers for every hit dice - what determines bonuses to HP for undead, whom lack Con altogether?
Sorry for all the questions - but I like to understand the rules as in-depth as possible, and everyone has been very helpful with great answers.
Undead use charisma to determine hp and on fort saves, and constructs get a flat bonus to hp based on size