“Our patron--Gaari, I suppose--should count himself lucky. These mana wyrms produce the finest silk in Eversong. I know Magisters who would kill to have a robe trimmed in this, and yet here we are, using it for a mending job. Ah well.
Once the wyrms have eaten their fill of arcane energy, you can siphon the silk from them onto these bobbins.
If they are reluctant to release their silk, you may have to, ah... beat it out of them. But I've been assured it's entirely ethical.”