Hungry

Serenity is a type of material found in Kingdom Hearts II that is used in Item Synthesis. Serenity materials are special as they are one of three materials called "modifiers"; its use is not required in any synthesis recipe, but adding one to the recipe offers benefits. Serenity materials are arguably the most useful and most powerful of the three modifying materials because they create entirely new, upgraded items when added to a recipe. For example, a Drive Recovery can be upgraded to a High Drive Recovery with the addition of a Serenity Shard, or an armor such as Acrisius is upgraded to the more powerful Acrisius+ with a Serenity Stone.

In order to use Serenity materials, you must upgrade the synthesis Moogle to Level 3, Junior Moogle. The Serenity items are assigned a gold color to distinguish them from other materials.

The Serenity materials in the Japanese Kingdom Hearts II are known as "Fulfilling" materials.

Drops

 * Serenity Shard: Assault Rider, Creeper, Fat Bandit, Graveyard, Hot Rod, Large Body, Toy Soldier
 * Serenity Stone: Crimson Jazz, Devastator, Dusk, Living Bone, Morning Star
 * Serenity Gem: Dancer, Dragoon, Gambler, Sniper
 * Serenity Crystal: Assassin, Berserker, Samurai, Sorcerer

Other Conditions

 * Serenity Shard: Collect 50 different materials, obtain all Rank C materials.
 * Serenity Stone: Collect 100 different materials, obtain all Rank B materials, win the Pain and Panic Cup, chest in Jungle at Pride Lands.
 * Serenity Gem: Obtain 250 different materials, collect all Rank A materials, collect all Dense materials.
 * Serenity Crystal: Obtain 500 different materials, collect all Rank S materials, collect all Twilight materials.

Kingdom Hearts 2: Final Mix + Changes
In this extended version of Kingdom Hearts, Serenity Crystals no longer drop from enemies, making them extremely rare. They are instead made by synthesis, requiring Remembrance Crystals dropped by the rare Reckless Heartless, Tranquil Crystals dropped by the Mushroom XIII, and Bright Crystals.