View source for Publication:Unearthed Arcana/Item Familiars

===Improving An Item Familiar===

An item familiar can be improved as other magic items can be. By spending gold pieces (and time and experience points, assuming the character is the one doing the work), a character can add new abilities to his item familiar. If a character links himself to a +1 longsword, for example, it only costs 6,000 gp (or 3,000 gp and 240 XP) to add another +1 of enhancement bonus or, perhaps, a special ability that is equivalent to a +1 bonus (such as spell storing or flaming). The character can accomplish this even without having the requisite item creation feats.

This type of improvement has nothing to do with the master’s character level, though it may affect the item’s eventual Ego score.
Prerequisite	Character level 3 +
Summary	You establish a link to that magic item, and the item improves in capability as you gain levels. +
Title	Item Familiars +
Type	General +