Thassilonian DelverAdventure: Pathfinder Society
As archaeologists uncovered and explored ever-larger numbers of Thassilonian ruins, you were among the eager explorers who sought out the Runelords' ancient secrets. You may have been the apprentice to another Pathfinder who perished on an expedition, leaving you their discoveries and notes. Or perhaps you explored several of these sites yourself, quickly learning to parse the arcane secrets before lest the eldritch magic extinguish your life.
Choose two ability boosts. One must be to Constitution or Intelligence, and one is a free ability boost.
You're trained in the Arcana skill, and the Thassilonian History Lore skill. You gain the Arcane Sense skill feat. Add Thassilonian to the list of additional languages you can learn for having a high Intelligence modifier.
Source: Organized Play Foundation