Craft Wondrous Items
Crafting wondrous items is an art form that only the finest of skilled magic users can perform. They utilize magic to twist, combine, and command materials to bind together into something great. This process is expensive and taxing. The results though are the finest items one could ever desire. On Amia, this is a feat you can take if you meet the prerequisites.
You can use Craft Wondrous Items on Unfinished Epic/Raid items to finalize the process of making the item. The base cost to do this is 25,000 gp. This cost is reduced by 5,000 for every 10 combined base skill ranks you have in Craft Weapon and Craft Armor, to a maximum of 50 ranks and a full 25,000 gp discount. Players without Craft Wondrous Items must bring their package to a PC with the feat, or go to one of various NPCs in the world who will perform the ritual for them at a flat rate of 50,000 gp. It is cheaper on average to get a player to perform the ritual for you, but you must trust them to return it afterward.
Epic Items
Epic Items are crafted by obtaining resource drops from bosses. There are 13 possible drops. These drops can be fused together to make components as well, which some of the more powerful epic items require. These resources and components are then used in combination with job system items to make Unfinished Epic Items. You must then have Craft Wondrous Items cast on the Unfinished Product. See the full list of Epic Items and their properties here.
Raid Items
Raid Items, much like Epic Items, are crafted by obtaining resource drops from raid bosses. They can be fused together to make components, which many of the Raid Items require. These resources and components are then used in combination with job system items to make Unfinished Raid Items. You must have Craft Wondrous Items cast on the Unfinished Product. See the full list of Raid Items and their properties here.