Abyss Crystal

Abyss Crystal is used for World of Warcraft: Wrath of the Lich King enchanting recipes.

It can also be used for Abyssal Shatter which rewards approximately 3 Greater Cosmic Essence or around 7-10 Infinite Dust

Source
This item is created when Disenchanting level 80 gear.

Enchanting

 * Enchant 2H Weapon - Massacre
 * Enchant Chest - Powerful Stats
 * Shadow Armor
 * Wisdom
 * Enchant Weapon - Accuracy
 * Enchant Weapon - Berserking
 * Enchant Weapon - Black Magic
 * Enchant Weapon - Mighty Spellpower
 * Enchant Weapon - Superior Potency