Premise[]
Requested by OpMasada. I guess Overlord currently scales to among the strongest possible spells, which... they shouldn't, apparently. Fallen Down is a powerful spell that nukes the world into oblivion.
Calc[]
People just keep doing my work for me. The resulting crater has been scaled for me kek.
Sadly, this image uses an estimated width. So we'll take a more conservative approach and use 2800 px, which is only slightly wider than the image since the crater is... big.
Shallter = 18 px = 1.40 m
Crater Height = 336 px = 26.13 m
Crater Width = 2800 px = 217.78 m
Volume of a half-ellipsoid with such dimensions would be about 3.245e5 m^3.
The stuff is pretty clearly vaporized what with the clouds of vapor hanging around, so it should be good.
Density of Stone = 2750 kg/m^3
Mass = 8.924e8 kg
Vaporization of Stone = 6077872 J/kg
Energy = Mass x Vaporization Value = 5.424e15 Joules, or 1.30 Megatons of TNT, Small City level
However it also went through a liquid state to become vapor, I'd assume.
Energy = Mass x Heat of Fusion (947657.98 J/kg) = 8.457e14 Joules, or 202.13 Kilotons of TNT, Large Town level.
Add them together for 1.5 Megatons of TNT, or still low-end Small City level.
Tally[]
Ainz Drops a Nuke: 1.50 Megatons of TNT, Small City level