Ars Solum

Ars Solum (ソロアルカナム) is a technique in Kingdom Hearts Birth by Sleep. Being a possessed version of Terra, Terra-Xehanort can also use a version of this Deck Command, although the speed and amounts of hits it can land as well are greatly increased through the power of darkness. The user performs a multi-hit combo, the player can add up to three additional hits if pressing successively when the on-screen prompts appear.

Mechanics
In Kingdom Hearts Birth by Sleep, Ars Solum is an Ultimate Attack Command that takes up two deck slots. Its maximum level is 6, and its reload time is 25 seconds.

Kingdom Hearts Birth by Sleep

 * Terra can acquire this Attack command from a chest found in the Skull Rock Cavern
 * Terra can create Ars Solum through Command Melding.

Kingdom Hearts Birth by Sleep

 * The first recipe can only be melded by Terra, and is a recipe that has a 5% success rate.
 * Confusion Strike (LV3) + Thundara (LV3)
 * The second recipe can only be melded by Terra, and is a recipe that has a 20% success rate.
 * Sonic Blade (LV5) + Dark Haze (LV4)
 * The third recipe can only be melded by Terra, and is a recipe that has a 20% success rate.
 * Stopga (LV4) + Dark Haze (LV4)
 * The fourth recipe can only be melded by Terra, and is a recipe that has a 20% success rate.
 * Stopga (LV4) + Sonic Blade (LV5)
 * The fifth recipe can only be melded by Terra, and is a recipe that has a 5% success rate.
 * Thundara (LV3) + Strike Raid (LV3)
 * The sixth recipe can only be melded by Terra, and is a recipe that has a 5% success rate.
 * Thunder (LV2) + Sliding Dash (LV2)
 * The seventh recipe can only be melded by Terra, and is a recipe that has a5% success rate.
 * Thunder (LV2) + Strike Raid (LV2)

Etymology
"Ars Solum" is a pun on the ability's original name "Solo Arcanum" ("First Secret" in Latin), and Last Arcanum's dub name of "Ars Arcanum" (roughly, "Secret Technique"). As such, it is meant to mean "First Technique".