Sora using Falling Slash on an object.
When used as a finisher, Falling Slash generates a shockwave.

Falling Slash (スラッシュドロップ Surasshu Doroppu?, lit. "Slash Drop") is an ability in Kingdom Hearts III. It allows the user to slash down on enemies from the air.

Mechanics

In Kingdom Hearts III, Falling Slash is an action ability that costs 2 AP to equip. While in the air and targeting an enemy on the ground, it causes Sora to slam down with his Keyblade. Occasionally, Falling Slash can be used as a finisher. When it is, it generates a unique shockwave effect and has a higher damage output.

Learning Falling Slash

Kingdom Hearts III