Arcana

Arcana is your understanding of the Light around the world. You arcana modifier adds to your LAC (Light Armour Class). If you take negatives in arcana, your LAC will be lowered as well. The minimum LAC a character can have is 1.

The Light Bringer would ask for an arcana when players are looking at something magical, trying to recall lore on gods, being able to tell what kind of spell has been used, etc.