Black Hole

Event Horizon, also translated as Black Hole, is a technique introduced in Kingdom Hearts 358/2 Days. It allows the user to slash enemies with a light-enveloped Keyblade and summon pillars of light.

In astronomy, the "" refers to the boundary around a black hole beyond which nothing, not even light, can escape.

Mechanics
In Kingdom Hearts 358/2 Days, Event Horizon is Roxas and Xion's Limit Break. It allows them to encase their Keyblade in light to slash at enemies with great strength. During the Final Limit, they summon four pillars of light around themselves that quickly move away in straight paths to the ends of the field, dealing heavy damage to enemies in their way.

In Kingdom Hearts Union χ, Black Hole is a that targets a single enemy. It costs 2 special attack gauge to perform in the English version, and 3 in the Japanese version. In the English version, it inflicts more damage the more gauges used that turn.

In Kingdom Hearts III, Black Hole is an action ability exclusive to Light Form. It is the form's third ground combo finisher. Its damage is calculated based on Sora's Magic stat.

In Kingdom Hearts Melody of Memory, Black Hole is an Ability usable by Roxas. It is triggered by activating an Ability Crystal near a grounded foe.

Kingdom Hearts 358/2 Days

 * Roxas has Event Horizon as his Limit Break.
 * Xion has Event Horizon as her Limit Break.

Kingdom Hearts Union χ

 * Black Hole +4 is the special attack for medal (Japanese version only).
 * Black Hole +5 is the special attack for medal.

Kingdom Hearts III

 * Light Form has Black Hole as a default ability.

Kingdom Hearts Melody of Memory

 * Black Hole can be triggered by activating an ability crystal as Team Days.