Just as Loki spied on people, someone spied on Loki…
He’d been walking aimlessly for the past half an hour, admiring the scenery of the night and immersed on thought not-really profound. But he wasn’t so concentrated that he didn’t notice the young Loki running to the castle… Not that he would be noticed, he was walking way over solid ground, and it was dark.
Nothing scared him or attacked him, that he could see. Surely finding out what happened wasn’t going to harm anyone? Not that anyone would notice him following the child… Hiding between the walls and shadow was easy for the animal.
“Brother! Thor! I have news!” And the horse listened. “Balder and Fandral are going on vacation without us!”
“What do you mean? Where are they going? And why was I kept from this? I’ve never really known those two to do things on their own together being such polar opposites. Hm. Perhaps I should confront one of them about it….” Thor kept speaking, concerned about their safety, and at this point the horse was about to leave….
"I mean they are going to Nornheim…” That last word made him stay in his place. Why would Balder, of all people, go there? “…In pursuit of a sword for Fandral, but Balder is going as well…they did not mention Loki, or you, and I thought that to be a bit odd.” Which it was. “Why would they go all the way there for a sword, can you not get a good one in Asgard? …I do not know why they kept it from you. Perhaps they are getting you a gift…”
"Asgard has some of the best smiths in the nine realms, I do not know what makes this sword so special for them to travel all the way to Nornheim…" I know. “Not to mention, why would Balder wish to go there when its queen is one of the few people he truly hates. I’ve never heard him use so much profanity. No, this isn’t right. Something’s wrong here. I think Balder has some ulterior motives, deadly ones. And I fear that he won’t succeed, and I will not have my brother dying upon that land.”
"So it is good that I told you then, see how useful I can be, brother?" At this point, most of the conversation ran out of material. Sleipnir didn’t know what to do with all of this information.
But his siblings surely would. Specially since, as he’d find out days later, more people would join the unlikely pair…This definitely was for them to know. One by one, he snatched them quickly, easy as if it was a common occurrence, and left them to join each other in a deserted Asgardian hall.