The Lunar Tattoo is obtained by visiting the Pretentious Artist while wearing the Luniform.
Please allow me to paint your portrait...
Ah, the Moonthril of the moon-bound elves. I know all about them, of course. I knew when everyone else was still talking about Yetis attacking Valhalla.
I much preferred it when they were up there alone, mutating and slowly dying. That's the kind of pain a true artist can share and appreciate. I'll try to channel that into this tattoo.