Aura varies; CL varies
Slot none; Price varies
DESCRIPTION
A spell tattoo is essentially a wearable scroll inscribed on flesh instead of on parchment or vellum. These tattoos appear as colorful and intricate patterns rather than magical writing. The tattoo is a silent, spell completion item that only the bearer can activate. It vanishes when activated. A spell tattoo must be visible to the bearer and must be touched as part of its activation. These magical tattoos are not normally placed on the head, neck, or back as a result, since most creatures would require mirrors to activate them. A spell tattoo’s aura and caster level varies as per the scroll it emulates. A spell tattoo has a market price four times as much as an equivalent scroll.
CONSTRUCTION REQUIREMENTS
Inscribe Magical Tattoo, the spell to be inscribed; Cost varies
I'm assuming its just like a scroll so if you could use cast that spell from a scroll then you can use a tattoo'ed version of it with just a touch. Am I reading this correctly?
I believe I've read in random places around the d20pfsrd website about spell tattoos on things like fighters, which apparently benefit them.
Don't quote me on it, but I think anybody can utilize a spell tattoo once it has been inscribed.
Not just anybody; it's a spell completion item (ISM pg. 16), so only spellcasters can use it (CRB pg. 458). (And from the description, only the bearer can activate it.) However, I see a major difference from scrolls: the components to be provided are never verbal, always somatic, and always visibility to the bearer/caster.