Karine will come to the party with the "Craft" skill, which can be accessed outside of battle. There are certain items in the game that Karine can use to create better items. You must find five of these items and use her crafting command for this achievement.
A list of items that can be used with "Craft":
1. Broken Paladin Helmet - Purchased from the shop in Green Grass village. It can be turned into a Paladin Helmet.
2. Ebony Stick - Found on the world map in the Mistlands of Myst area. It's found in the south eastern forest near the lake. Hover your mouse and click around the area until you find it. Can be turned into the Defensive Trident.
3. Long Bone - Found in the Rogue Territory. There is a broken pillar that you can spot while chasing the Rogue around the area. It will be around where you find the Rogue for the second time -- west of the entrance. Can be crafted into an Ivory Lance.
4/5. Titan Tooth/Titan Skin - These are two drops that you can get after fighting the Rogue boss. The Tooth can be turned into Rogue Hatchet. The Skin can be turned into a Titan Corset.
6. Broken Lamp - Found in the Crypt northwest of Bogobaka. Once you are able to access the quest by completing the quest for the ghost, go into the crypt and look inside the barrel south of the ghost to find the Borken Lamp. It can be crafted into a Djinn Lamp.