I haven't been able to spawn a Pirate from my cows yet. *eye roll*
I like the Pirate Lass. She is pretty (by conventional Eurocentric standards), and she only takes 5 energy to battle. I did buy a trap for a Pirate, and he takes 13 energy to fell.
I had no intention of playing this event as I don't really care for the kids (ducks flying tomatoes, or possibly rotten cabbages?). I 'm just not a fan of humanoid creatures. But seeing their potential drops (I took a screenshot, so I know I am not delusional this time!), I figure I better play. I am stuck on several storylines for lack of Mithril. It looks like the kid in blue drops Mithril. And the white gator drops (I don't remember what it's called for sure) - life crystal? Something I haven't needed yet, but also something that seems to be very rare, so by golly I want more of it!