If you ever make(made) an specialspecial focus/compound just for the fun of it or to make your runners drek their pants, post your idea on its power and give the post above a drawback
Ex. Page87, Street Magics "Turn Spirit to Guacamole" focus that can only be used once every 127th year or so.
Have fun
I start with this:
Power: A compound that when ingested through [insert way of ingestion here], it grants the power to litterally go through walls