BrilliantEquipment 12
Source Pathfinder Secrets of Magic
Price 2,000 gp
Weight negligible
This rune causes a weapon to transform into pure, brilliant energy. The weapon deals an additional 1d4 fire damage on a successful Strike, as well as 1d4 good damage to fiends and 1d4 positive damage to undead.
On a critical hit, the target must succeed at a DC 29 fortitude or be Blinded for 1 round.
Activate 
command (light)
Effect You plunge your weapon into darkness to return the light. Attempt a counteract check with a counteract level of 5 and a +19 counteract modifier to end a magical darkness effect whose area is within reach of the weapon.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
EvocationEffects and magic items with this trait are associated with the evocation school of magic, typically involving energy and elemental forces.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.