So I got a regular Ferrikki essence while I was nurturing eggs for the High Priestess rank, I didn't even know that could happen so that was cool. But now I'm wondering what the odds of that happening are or what triggers it. Is it just extremely rare, 1/1,000,000 chance or does it happen after you nurture so many eggs of a particular species or what? I figure it's not the most efficient way of getting essences, but it'd be nice to know how often I can expect it.

I'm going to save the essence for a future breeding project btw, please don't ask/offer for it.

There's a thread somewhere where someone' s keeping track

BUt it's not that accurate since it's a kinda randomized chance

I got 2 essnences after nurturing 8k eggs so yeah

I'm the one keeping track.

Assuming I'm doing the math right, it's about a 0.01844% chance. It's not after any certain number of nurtures. You could get two essences back to back, or have 10k nurtures in between essences. It's really just random chance. But 71 essences' worth of data should give a decent idea of how rare they are, on average.