Quake

Quake is a technique that appears in Kingdom Hearts:Chain of Memories, Kingdom Hearts Birth by Sleep, and Kingdom Hearts Re:coded. It allows the user to generate a small earthquake that also kicks up pillars of rock. In Kingdom Hearts Birth by Sleep the command is exclusive to Terra. Terra-Xehanort can also use the ability since he is an extension of Terra.

Mechanics
In Kingdom Hearts Birth by Sleep, Quake is an Ultimate Attack Command that takes up two slots in the Command Deck, has a maximum level of 5, and a normal reload time of 20 seconds.

In Kingdom Hearts Re:coded, Quake takes up 15% of memory.

Kingdom Hearts Birth by Sleep

 * Terra can create Quake through Command Melding.
 * Terra can purchase Quake from the Moogle Shop for 2500 munny once the command has already been obtained elsewhere.

Kingdom Hearts Birth by Sleep

 * The first recipe.
 * Brutal Blast (LV4) + Brutal Blast (LV4)
 * The second recipe.
 * Brutal Blast (LV4) + Magnega (LV4)
 * The third recipe.
 * Mine Square (LV3) + Binding Strike (LV3)
 * The fourth recipe.
 * Stun Edge (LV3) + Mine Shield (LV3)
 * The fifth recipe.
 * Zero Graviga (LV4) + Brutal Blast (LV4)

Kingdom Hearts Re:coded

 * Zantetsuken + Cyclone

Kingdom Hearts Birth by Sleep
Quake is used to meld the following commands:
 * Meteor Crash

Origin
Quake is a recurring Black Magic spell in the Final Fantasy series. It usually deals earth-elemental damage to one or all opponents, and may not affect flying enemies, depending on the game.