Custom thaumaturgy you have used?

After the fifth dot in blood magick, meaning 7th gen or higher, it mentioned you can create your own path (Less I read wrong).

What sorts of blood magick have you seen, used, or watched others used in the past? Whether through Larp or Tabletop, maybe even in books.

I haven't seen a tech based blood magick but it seems everyone and their mother sire has something that disables technology. Atleast in the books.