Defensive bonus
A defensive bonus directly affects Defensive Strength. In its most common form--on armor and shields--it is equivalent to the item's enchantment.
In rare cases, other wearable items, such as clothes, shoes, and jewelry, were given defensive bonuses; these items are known as "DB items."
Temporary defensive bonuses are available in the form of a wide variety of defensive spells. There are many such spells, and the most common ones include Spirit Defense (103), Mass Blur (911), Mass Elemental Defense (419), and Mass Colors (611).
A defensive bonus can also be granted by a rare enhancement found on some weapons (known as defender weapons). The defender bonus on a weapon takes up the same property slot as standard flares or weighting.
For both defender weapons and DB items, creation of and adding to the bonus is a very rare merchant service.