Unkillable does fit the concept; if the advantage had been around in '89, it would've been reasonable for Johnson to include it in the 3e writeup. Not sure I'm in favor of incorporating the Loi into official IST canon, but if it works for your campaign, go with it.
Your campaign has a lot of fun stuff going on, and this deal in Somalia sounds like another thing I'd consider incorporating, or at least drawing inspiration from, if I were Bob.
Your campaign has a lot of fun stuff going on, and this deal in Somalia sounds like another thing I'd consider incorporating, or at least drawing inspiration from, if I were Bob.