From Guild Wars Wiki
|Bonus|| Armor +10 (while affected|
by an Enchantment Spell)
A Blessed Insignia is an upgrade component that provides an armor bonus of 10 extra armor rating while you are affected by an enchantment spell. This bonus is not global and applies only to the armor piece equipped with the insignia.
|Armor +10 (while affected by an Enchantment Spell)|