Ars Solum

Ars Solum (ソロアルカナム) is a technique in Kingdom Hearts Birth by Sleep. The user assail enemies through a ferocious multi-hit combo, three additional hits can be use by 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, its reload time is 25 seconds and fills the Command Gauge by 6%.

Kingdom Hearts Birth by Sleep

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

Kingdom Hearts Birth by Sleep
Ars Solum is a Ultimate-class Attack Command that can be melded through seven different recipes, listed in the Giga Attack Recipe.
 * 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 a 5% success rate.
 * Thunder (LV2) + Strike Raid (LV2)

Other appearances
Terra-Xehanort inherits this technique from Terra, and uses it during his boss battle, however the speed and amounts of hits it can land as well are greatly increased through the power of darkness.

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".