>>42333051
Also trying to farm all the traits, somewhat in order:
Read about Dreams of the Bats - Read Newspaper
Mapped the Cave - Pick up paper
Made Aware of Secret Passage - Look Down in Chasm
Called by the Altar - Touch Altar
Found the Entrance - Inspect Map in sun
Briefed by Long-Dead Bats - Search Armory Further
Demonic Creature - Accept the Bargain, can be turned back into Batpony at the Altar
Saw the City's Past - Burn Armor/Inspect Armor in Sun
Discovered the History of Batponies - Fight the "Rats"
Learned of Princess Luna's Origins - Read Inscriptions on Walls
Alicorn Princess - Enter Gate of Destiny
You lose some of these when passing through the gate as well.