Colors added to a piece of line art by TheGoldenSmurf TheGoldenSmurf from the /a/ drawthread. You can see the original image here: Explosion
Featuring the characters Satou Kazuma and Megumin from the anime Kono Subarashii Sekai ni Shukufuku wo!

TheGoldenSmurf, who did the line art, made this a pair of images with a nice before and after that fits perfectly with the anime.

The explosive follow up.