Neat, more dragon egg. This is what more isekai and novels in general need to be doing, having the characters choose between meaningful options. In this case, between what Irushia wants and what is right.
@dmr11 we'll he said the rock dragon wasn't anymore interested in him then any of the villagers, so he wouldn't be able to lure it away. If he evolved into something of equal size to the rock dragon they would end up flattening the village if they fought.