# Why are the Prismatic Dragon's attack bonuses wrong?

## The Question

I've been fiddling with the Epic Dragon statblocks recently, as they're given on the SRD, and I've found something that bugs me: some of the calculations are inconsistent, and some of them are just wrong.

While the saves conform to the Epic advancement rules after 20HD, the BAB doesn't, instead just continuing to increase at +1 per HD - and then, when calculating attack bonuses, the result is a few points lower than it should be considering the given base attack and Str score. At first I thought they might have just made a mistake listing the base attack and then properly calculated the attack bonuses with the Epic rules, but when I ran the numbers it turned out that it was even lower than the given value when calculated that way.

Did I miss something, or have they just fudged it? Should I recalculate the saves without Epic progression to make it match? Should I recalculate the attack bonuses with?

## The Maths

Prismatic Dragon (Young): 33HD, Str 37, BAB as given: +33, Attack bonus as given: +42.

• Calculations with numbers as given:

Str bonus is (37-10)/2 = 13.5, rounds down to 13
Attack bonus should be 33 + 13 = +46

• Calculations corrected for Epic BAB progression:

At level 33, Epic BAB is an additional +7 for a total of +27 Str bonus is +13; attack bonus should then be 27 + 13 = +40

• Final Numbers:

• Attack bonus as given: +42
• Attack bonus as it should be with given numbers: +46
• Attack bonus when corrected for Epic BAB in accordance with use of Epic save rules: +40

Ideas I have as to why this is and how it should actually be working: 0