Command Meld

Command Meld is a system in Kingdom Hearts Birth by Sleep that replaces the traditional Item Synthesis. Like Materia Fusion in Crisis Core -Final Fantasy VII-, Command Meld allows the character to create new Deck Commands by combining specific pairs of Commands. Most Commands must be mastered in order to be used as ingredients. Furthermore, synthesis materials such as the Fleeting or Abounding Crystal can be added to the mix. Although this does not change the resulting Command, it attaches a certain Ability to it, depending on the Crystal used and the meld it is applied to. If one of the ingredient Commands already has an attached Ability, the resulting Command will also have an Ability of the same category, and it is also possible to have an Ability attach to the resulting Command completely at random. It is also possible for the Command created to immediately upgrade to a Rare Command; several powerful Commands and all meldable Shotlocks require can only be created in this manner.

For example, mixing a Lvl 3 Fire Surge and a Lvl 3 Aero will produce Aerial Slam. If a Soothing Crystal is added to the mixture, the Aerial Slam will have an attached HP Boost ability.

A detailed table can be found via GameTrailers.com @ http://wikicheats.gametrailers.com/Kingdom_Hearts:_Birth_by_Sleep_-_PSP/Meld_Commands