The fart to end all farts

You consume the bean soup and chant for two days straight without sleep or food, after which you create a fart cloud of 26,400,000 radius and everything in that radius need to make a con save, on a failed save they takes 4d8 poison damage, and half as much on a succesfull one. make another con save On a failed save they can't breath and drop dead, on a succesful save they ignore this condition. Once every day you need to make yet another con save, on a failed save you take 4d8 pison damage and half on a succesful one.