Rivian's gold-quality Leafwing Moth was one of the numerous evolutionary forms of the black-iron-quality Silkworm, a spiritual creature so common it bordered on mundane.
But despite its low quality, the Silkworm held a unique position among contracts—they could meet the contractual needs of over a third of newly awakened individuals, while also being incredibly cheap.
Actually, cheap isn't even the correct term for them. They were pretty much free.
Silkworms could be found in almost any garden or park, their tiny, white plump bodies inching along leaves or spinning fine silk threads among the branches.
They were a creature the poorest of beast-tamers could easily contract by just plucking one from a bush.
In towns and cities, children played with them, fascinated by the shimmering silk threads they produced, unaware that this humble creature was also one of the most popular beginner contracts among the underprivileged.