NotActuallyTim
First Post
The only thing I thought might have been an issue was that (at first) I felt it made more sense for the Dragon to deal radiant damage, but then I considered that you can get resistance to radiant damage, which would defeat the purpose of risk/reward. So that is a moot point.
Personally, I will be making it require attunement, to avoid the inevitable quest to "get inked". Not to mention, a group of monks that each have three of these would make for an interesting encounter, without giving them a bunch of Magic stuff that is just waiting to be looted.
I'd make it so getting more than one tattoo was inherently dangerous, and continued to place strain on a persons body afterwards. Con saves versus death, starting at DC 15 and increasing by 1 with each new tat, and after 3 tattoos the wearer would constantly have their Ki become unaligned, causing violent insanity and eventually spiking their Ki points to above their normal threshold whenever they rest, resulting in the 10d10 force damage per turn effect from the Dragon tattoo (20d10 if they have Dragon tattoo).