An Elder God sits there, watching over them. As you approach, the Elder God notices your presence.
"Hello, traveler," the Elder God greets. "Look at all these critters. They're perfect as companions or pets."
You glance over and see critters of various colors, types, and rarities.
"If you like, you can adopt one," the Elder God says, holding out a pink moth.
You smile as he hands it to you, and you carefully take the delicate creature into your hands, contemplating adopting one of them.