I have a player interested in using mystical tattoos, made via the invention rules.

I have a player interested in using mystical tattoos, made via the invention rules.

I have a player interested in using mystical tattoos, made via the invention rules. Has anyone done this before, or have a list of potential ideas for effects to use? I’m still new to Blades, so I’m struggling to come up with cool ideas that are appropriate to the setting and make sense mechanically for inventions.