Mage's Tattoo grants a SLA based on school (in addition to +1 caster level). When gained via the Tattooed Sorcerer archetype (Inner Sea Magic campaign setting) it either uses the same school as Spell Focus or that of the player's choice if they do not have Spell Focus. Without Spell Focus a Tattooed Sorcerer does not get the SLA (not listed under "Innate" in Spells tab) in PCGen.
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