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<blockquote data-quote="Kerrick" data-source="post: 4189894" data-attributes="member: 4722">On another note.... I am the MAN!Okay, maybe I'm tooting my own horn a little, but I think I deserve it. I figured out the dragon AC problem, and it only took me about an hour to do it.After doing my usual rounds of the forums, I grabbed a can of peaches (it was midmorning and I was hungry) and, armed with a MM, the v4 rules, a notebook, and a calculator, went to sit outside in the sun while I worked.I won't bore you all with a long story, so I'll cut to the chase: the 3/4 HD bonus for natural armor does work, but you have to add the dragon's age category also. At age categories 10, 11, and 12 (Old, Very Old, Great Wyrm), the NA bonus becomes 2/3 HD for some reason. So the formula is:10 + size mod + NA (3/4 HD) + age category = AC (which is still CR * 1.5, or CR + 20 if CR &gt; 20).I tried this for just about every dragon, and the results are off by no more than 2 points- bronze, gold, and red are dead on; green, and brass are very close (+1 at most levels); black is fairly close (off a bit at the low levels), and blue and white are off by a lot (2-3 at every level). I have a feeling the CRs for blues and whites are wrong.One other thing I noticed: if you use 1/4 HD as the NA bonus for Tiny dragons, the AC is almost dead on. I'm not quite sure why that is, but it works for all three I tried - whites are the same (predicted AC vs. actual), and black and brass are 1 off.I've attached the Excel sheet so you can check it out.</blockquote>

[QUOTE="Kerrick, post: 4189894, member: 4722"] On another note.... I am the MAN! Okay, maybe I'm tooting my own horn a little, but I think I deserve it. I figured out the dragon AC problem, and it only took me about an hour to do it. After doing my usual rounds of the forums, I grabbed a can of peaches (it was midmorning and I was hungry) and, armed with a MM, the v4 rules, a notebook, and a calculator, went to sit outside in the sun while I worked. I won't bore you all with a long story, so I'll cut to the chase: the 3/4 HD bonus for natural armor does work, but you have to add the dragon's age category also. At age categories 10, 11, and 12 (Old, Very Old, Great Wyrm), the NA bonus becomes 2/3 HD for some reason. So the formula is: 10 + size mod + NA (3/4 HD) + age category = AC (which is still CR * 1.5, or CR + 20 if CR > 20). I tried this for just about every dragon, and the results are off by no more than 2 points- bronze, gold, and red are dead on; green, and brass are very close (+1 at most levels); black is fairly close (off a bit at the low levels), and blue and white are off by a lot (2-3 at every level). I have a feeling the CRs for blues and whites are wrong. One other thing I noticed: if you use 1/4 HD as the NA bonus for Tiny dragons, the AC is almost dead on. I'm not quite sure why that is, but it works for all three I tried - whites are the same (predicted AC vs. actual), and black and brass are 1 off. I've attached the Excel sheet so you can check it out. [/QUOTE]

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