The way I’ve drafted is the following, in short:
- to replicate the idea of it being powered by a soul vessel, my recommendation is a one-time inflicting of a Trauma.
- the other side of the equation is using Stress to pay for the use of augmentations. These would serve as a non-zero floor to their Stress track until the augment was removed. For example, the augment “mechadendrite” is a tier III asset. While the augment is installed, the character spends 3 Stress, and that Stress bumps the thread hold for overindulging Vice up to 3.
- there are new tags that might apply to the augments, like “Grotesque” which signifies that it might make normal social interactions difficult if not impossible (but intimidation efforts are a different story).
The player has put forth a different approach. Basically, everything would be “paid for” as Harm, and acquiring the assets would be expensive to obtain. I’m fine with the latter, but the former is… I’m having a hard time working with that. Harm, after all, can cascade upwards if a certain row is full, and I have to always consider if that harm would come into play. It seems counterintuitive to have a tool that allows for special abilities but also might make you lose dice or need assistance to do other jobs. And you’d still need to see a physicker afterwards? Huh?
The lightest approach is just to crib the Xeno powers from S&V, but the player didn’t like that idea.