For ink, the only thing Di Tou could reasonably think of was more of the red dust he had used as his canvas, but he had already been running low in the first place, and he certainly didn't have enough to coat the entire surface of the moonlit platform… much less the moonlit platform and the area around it.
Besides, he just thought it looked like a seal, he had no clue if it meant anything at all.
Although… the last time he had felt a desire to do something, it had resulted in the strange 'Bu' character and then the 'Fire' character, so perhaps there was some validity behind this random instinct.