You can basically get it from spiders, but in large numbers, they tend to kill each other, eat each other, so you've got a problem with creating it, in the same way you do with regular silk.
Básicamente se obtiene de las arañas, pero en grandes cantidades, tienden a  matarse y a comerse unas a otras, por eso hay un problema al crearla, de la misma manera  que sucede con seda regular.