Ye Mo looked at the mere ashes Ren Pingchuan had been turned into and stood there being dazed for a while. That fireball was just meant as a warning, and he was sure that if Ren Pingchuan had wanted to dodge it, it wouldn't have hit.
Pity, he still had some questions to ask him, f.e. where the spirit well was. But now, he couldn't find out the easy way.
Ye Mo searched around the Gourd Cave, and only found some stone rooms and prisons. He didn't find the entrance to the spirit well. What a pity, if those 4 magical crystals were spirit stones, perhaps he could've used them to reach stage 5.
Perhaps the spirit well wasn't here in the first place. Ye Mo left the Gourd Cave on his flying sword in disappointment. From then on, there would be no more Gourd Cave. As for the spirit well, he would go ask Feng Wu. Perhaps he was now the only one who knew its whereabouts.