An Ice Trader's Dream

Teleport to Ice Merchant Cabin from Town of Schuttgart. We talk with Rafforty and take the quest.
By killing any monsters in Frozen Labyrinth you will receive a Silver Ice Crystal.
Once you have enough crystals, go to the Ice Shelf (located next to Rafforty ). Using Ice Shelf you can turn your Silver Ice Crystal into Black Ice Crystal (Black Ice Crystal) with a chance of about 1 in

4.
You can get a reward from Rafforty for crystals: Crafted Leather = 23 Silver Ice Crystal Coarse Bone Powder = 6 Silver Ice Crystal Steel = 8 Silver Ice Crystal Scroll Enchant Weapon (A) = 1800 Black Ice Crystal Scroll Enchant Armor (A) Enchant Armor (A) = 240 Black Ice Crystal Scroll Enchant Weapon (B) = 500 Black Ice Crystal Scroll Enchant Armor (B) = 80 Black Ice Crystal

Translation from http://lineage2.stratics.com/content/library/quests/index.php?id=15205