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Source: Encyclopedia Arcane: Magic Item Creation

Description: You have formed a bond with a particular suit of armor or with a weapon.

Prerequisites: Iron Will

Select a single suit of magical armor, a shield or a weapon, with a +1 or greater enhancement bonus. You are now and forever bonded with that item. The bonuses gained for bonding depend on the type of bonded item, as listed below.

If the bonded item is a weapon, you gain a +4 bonus to opposed disarm checks when attempting to retain your weapon, a bonus which stacks with all other applicable bonuses.

If the bonded item is a weapon or shield, the hardness bonus is increased to +3 per point of enhancement bonus, rather than +2. In addition, it gains +15 hit points per point of enhancement bonus, rather than +10. This bonus applies while the item is in hand, or on the bonded character’s person.

If the bonded item is a shield or suit of armor, then the armor check penalty of the item is reduced by 2, to a minimum of 0. This reduction stacks with that gained from using exotic materials.

If the bonded item is a suit of armor, the amount of time necessary to don or remove the armor is reduced. Bonded armor can be donned normally in the time required for non-bonded armor to be donned hastily and can be donned hastily or removed in a single round, regardless of type. Bonded half plate and full plate armor assist you in the donning, meaning he can armor himself normally in two minutes, rather than four.

Regardless of the type of bonded item, you can sense its location to a distance of 100 feet.

A character can be bonded to a maximum of two weapons, one suit of armor and a single shield. Should he lose his bonded item, should it be destroyed or should he simply wish to bond himself to a new item, he can do so but must wait until he advances a level and must pay a cost in experience equal to 100 x the total effective enhancement bonus of the new item.