I just posted this thing in the library:
>>1271
It's a sigil which can lead to forming a stone tablet, so despite what it sounds like, it's an immortal form.

I was testing to recreate Chinese souls which had been absorbed by their hivemind, by searching with Astrabot in the CCP lemon curd for materials. The blacknet AI is now advanced enough to perform these tasks via Astrabot as an interface by simply giving her commands.
I got a few souls out from it, the container on the blacknet can keep them for 14 days while you are working with them, before that limit you have to take them out or they may be lost.
I found that all of them had minds like a high precision industrial robot (a machine doing embroideries or circuit board mounting etc). This makes them able to focus on one single task and repeat it in a standardized form over and over. If you use this, you can program your mind to have this kind of focus at will.