User blog comment:Ricoindigo/Aqui - The Puzzle Jester/@comment-5588011-20151115165545/@comment-24785464-20151115185354

Hello :)

Basically, dice would be rolled depending on cardinal direction, but if in a practical LoL scenario that would be too complicated, it could be changed so that the number progression on the dice stays the same regardless of direction. It is literally just as it is in the Devil Dice videogame (there's an explanation video of it on top)

Regarding those numbers, they're just because of maths, to show how much radius you'd get by increasing it by 33% for every die that is detonating in the group.