Minor artifact

Minor artifacts are a special category of named items with particularly powerful enchantments and the ability to slot filigree from Sentient Weapons. Characters can wear only one artifact at a time. First minor artifacts were introduced with the Masterminds of Sharn expansion in Update 42.
 * They start with one slot for a single sentient filigree.
 * Sentient Jewels are not used, you can level the artifacts directly by feeding them named items.
 * The XP cost for leveling is one half of Sentient Jewels.
 * Filigrees stack with filigrees on weapon; still only different filigrees stack but even identical filigrees count for set bonus.

The following applies to U42 artifacts:
 * The maximum number of filigree slots is three. cannot be used to increase the number of slots.
 * The Sharn artifacts are unique items flavored as coming from different parts of Khorvaire (museum artifacts)
 * They drop in raids and as saga rewards.