Dream Shard

Dream Shards are used in high level enchants as a reagent, and also as a currency to purchase enchanting recipes from Vanessa Sellers  in Dalaran.

Source
Obtained by Disenchanting level 165+ items, either crafted or looted, and rarely obtained by disenchanting level 152+  items. One can also merge three Small Dream Shards to create this item.

Engineering

 * Gnomish X-Ray Specs

Enchanting

 * Runed Titanium Rod
 * Enchant 2H Weapon - Scourgebane
 * Greater Assault (boots enchant)
 * Tuskarr's Vitality
 * Superior Spellpower
 * Exceptional Resilience
 * Enchant Chest - Powerful Stats
 * Major Agility (cloak enchant)
 * Superior Dodge (cloak enchant)
 * Armsman
 * Crusher (gloves enchant)
 * Enchant Gloves - Major Agility
 * Enchant Staff - Greater Spellpower
 * Enchant Weapon - Accuracy
 * Enchant Weapon - Berserking
 * Enchant Weapon - Black Magic
 * Enchant Weapon - Exceptional Agility
 * Enchant Weapon - Exceptional Spirit
 * Enchant Weapon - Giant Slayer
 * Enchant Weapon - Icebreaker
 * Lifeward
 * Enchant Weapon - Mighty Spellpower
 * Enchant Weapon - Superior Potency

Jewelcrafting

 * Dream Signet

Tailoring

 * Merlin's Robe (Alliance)
 * Merlin's Robe (Horde)