Watching Mr. Riddle eat, Shard wasn't worried that he might suddenly eat too much and upset his stomach, as the "Satiety Food" had an excellent healing effect on gastrointestinal issues.
However, Mr. Riddle did not finish all his food but, after eating one-third of it, asked Shard for a wooden box, gathered the remaining food onto a plate, and placed it inside the box, seemingly planning to save it for later.
After all, no one could stand eating biscuits for an unknown length of time.
Having tasted normal human food again significantly improved the spirits of Mr. Riddle, who had been on the brink of collapse. With Shard's arrival providing him with someone to talk to, Mr. Riddle's mental state visibly improved a great deal.
Before starting the gambling game again, Shard asked Mr. Riddle about the origins of the deity that had been summoned to this gambling table. The middle-aged man, who had been staying here for quite a while, indeed had an answer: