They can recreate Circuits, to a degree, with enchanted ink.

[Of which Gilgamesh now had quite a few. The curling end of a tattoo can even be seen near the edge of his collar. But a woman like Caren desired absolutely control, which he can't exactly blame her for. It would be almost too convenient to be able to summon him anytime, anywhere.

Too convenient, and too powerful, which is likely why the gods of this world decided she couldn't have it.]

But as for a simple tattoo... you would honor me and our bond if I might perform the rite personally. I have sufficient skill with a needle.