Maybe she should explain the printing press again to this audience.
"You're all adopted," she says. "I was adopted too. My birth parents' race are called Jötun and my adoptive parents' race are called Asgardians and the two of them are in a long, long, long war, that started before I was born. And one day my adoptive mother Odin scooped me up and took me home and told everybody I was her daughter, and made me look like an Asgardian, which I still do now except on special occasions; and I had an Asgardian father, too, and an Asgardian sister. And nobody told me I was really a Jötun."
"That's not going to happen to you. You get to know what you are from the start. You're orcs; your birth parents were orcs; somewhere some generations back you have Elf ancestors, because that's where orcs came from, sort of how werewolves are made from Men."
"As far as I know Asgard and Jötunheim are fighting for no reason at all. That could be just because no one told me there's a reason, or it could be just a very stupid war. But you might have picked up that most orcs are fighting most everybody else."
"Elves and orcs have a trait which means that they can promise to do things, and then can't break their promise," Loki says. "It's just the same in both species, but the difference is that Elves almost never swear any promises like that, so they can do what seems right to them, day to day; and all the orcs except you and another orc colony southwest of here live under the Enemy. And he makes them promise, and that still works, and then they're all out of choices about anything he makes them swear, forever. You all need to be very careful not to swear things. This is extremely, extremely important, because if you do it, you can't take it back, no matter how much of a bad idea is or if you fumbled the words and they came out not what you meant or if something changes to make you not want to do the thing anymore."
But the orcs the Enemy has don't get that lecture. They just get told to repeat certain words, and then the Enemy can use them however he wants. He can make them do anything. He can do it from hundreds of miles away, if a Maia's around to deliver the orders with osanwë. Sometimes he tricks Elves into making oaths, too, I've seen that happen once - well, I saw the aftermath."
"Don't try it. I know why it might seem like a good idea, but don't try it. Ideally the Enemy will never be personally interested in you and you'll never even be very tempted to make an oath. If he ever is, though, any oath you've ever made before he can make you forget, and then he can make you make another oath on top of that which contradicts it, and then your life is ruined forever. He's done it. He did it to my friend Vár."
She pats one on the shoulder. "It's horrible. The Enemy is very horrible. And the best advice I can give you to deal with that is to not make any oaths even about not making oaths. One day I'm going to figure out how to kill him and then the world will be much safer."
She hugs all the little orcs and sends them off to play.