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Millenium Earl Calc
Problem #1: It uses the size of modern-day Tokyo, while the series takes place at the end of the 19th century. The calc uses a radius of 26426.73 meters, which is far higher than the actual radius would be. I couldn't find any direct data on the area of Tokyo is this time period, but I did find this map from 1907 (close enough I think). Measuring the distance between Osaki Station and Tabata station (luckily they still exist), located on opposite borders of the city, I got a diameter of 13500 meters, or a radius of 6750 meters. This is more than 4x smaller than the size the calc uses. My size measurement does not need to be used, if someone else can find a better source then that will work as well. It just needs to be something from this general time period instead of the 21st century. If anything, 1907 is still a big highball considering the Edo period is still ongoing in DGM while it ended in 1868 irl, so the city is probably far smaller than its real-life counterpart from the same time period.
Next, I'll get into issues with the calc that don't really have anything to do with the series, but rather just the methodology. Take these with more of a grain of salt since I know less about calcs than I do D.Gray-Man, but I still feel strongly that there are fundamental issues with the methodology of the calc:
Problem #2: I don't understand the reasoning for the "volume" of Tokyo. The 40 meters doesn't refer to the "height" of the city, it refers to its elevation above sea level. The Millenium Earl flattened the city, that has nothing to do with its elevation above sea level. So basically I have no idea why a feat of flattening a city is being treated like a feat of vaporizing a 40 meter high cylinder of stone.
Problem #3: The feat is the Millenium Earl destroying Edo, with the value supposedly coming from the vaporization of the whole city. The value it gets is very inconsistent with other sources I have found (in large part I think because of the 40 meters of stone chosen for some reason). For example, according to this calculator, a 18000000 kiloton (18 gigaton) explosion would result in a fireball with a radius of ~26500 meters. This calculator agrees, with 18000 megatons resulting in an airbust fireball of 26.6 kilometers. Both of these calculators give a result that makes far more sense to me, and the currently used calc resulting in a value 100x higher than the aforementioned calculators really makes me question the validity of the current calc. I don't know if its the heat method, or if its the 40 meter thing leading to these inflated results.
Lavi Calc
This one is much simpler. The move Lavi used to perform this feat isn't actually an attack, so this should just become Environmental Destruction.5-B Heart
This one I really don't get, because the justifications for the 5-B key directly explain why the feat isn't 5-B. The heart didn't blow up the planet, the "end of the world" was the Great Flood. It should be replaced with the already accepted calc for flooding the Earth. I am also unsure about scaling the Millenium Earl to it directly. We have no idea what "fighting" the Heart means in this situation, so I don't think we can assume that he scales at all to its causing of the Great Flood. I see no reason to assume it was a 1v1 fight between the Millenium Earl and the Heart, or that the Earl could in any way stand up against the full power of the Heart. It seems much more likely to me that it is referring to Innocence rather than specifically the Heart itself.Proposal:
1. Recalc the Millenium Earl feat with the correct size of Tokyo/Edo and a more accurate/reliable method. Explosion seems the most resonable to me, but if there is a method for calculating the vaporization of the city that is more accurate, then that works too. This value should become the primary value of scaling for most series.2. Lavi's calc should become Environmental Destruction that scales only to him.
3A. Remove scaling from the Heart entirely
3B. Change the wording to "possibly," and the value from 5-B to 6-A.
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