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Mastering Magic / Building and Modifying Constructs

Repairing Constructs

Source Ultimate Magic pg. 113
Even with the best of care, most constructs will eventually become damaged. Unless a construct suffers some sort of structural damage that radically alters its physical form, the construct continues to function at its full efficiency, and only falls apart once reduced to 0 hit points. Ideally, however, a construct should see some repair before it reaches that point. The make whole or rapid repair spells provide the easiest way to keep a construct in good condition. Both spells repair damaged constructs, even magic-immune ones like golems.

Failing that, a crafter can repair a construct with the Craft Construct feat. When repairing a construct, its master spends 100 gp per Hit Die of the construct, and then makes a skill check as if he were crafting the construct with a DC of 5 less than the DC for crafting that construct. With a success, the construct regains 1d6 hit points per Hit Die of the construct. Completing a repair takes 1 day per 1,000 gp spent on the repair (minimum of 1 day). Repair in this way can only be performed while the construct is inanimate or nonfunctioning. At any time, a construct’s creator can deactivate a construct under his control with a touch and a standard action.

A construct that has been completely destroyed cannot be repaired, though at the GM’s option some of the materials may be usable in the construction of a new construct. Additionally, some constructs have special means of repair, usually involving spells related to the golem’s nature (such as the use of acid damage to heal a clay golem.)