Light of Judgment
From Final Fantasy Wiki
In Final Fantasy VI, the Light of Judgment (裁きの光 Sabaki no Hikari) is the term given to the destructive ray sent down by Kefka Palazzo from atop his tower onto towns which he feels are resisting him. The Light is shown as a destructive beam of energy cutting a path of flame into the ground, but it is also implied that the light creates or summons monsters to wreak more havoc.
Kefka turned the Light of Judgment on Mobliz, Narshe and South Figaro sometime prior to Celes Chere awakening a year after the apocalypse. Mobliz's adults were killed protecting their children and half the town was destroyed while Narshe's citizens either perished or fled, leaving the town abandoned and plagued by monsters. South Figaro's citizens largely survived and rebuilt the town. Kefka later turns the Light on Tzen, destroying the mansion of the wealthy family there.
During the party's confrontation with him, Kefka turns the Light of Judgment onto the planet raging that he will kill everyone. No specific target or casualties are shown, however. While Kefka does not use the Light of Judgment during his battle with the party, it is possible that one of his other attacks (Hyperdrive, Ultima, or his signature "Forsaken") could be what the townspeople interpreted as the Light. Forsaken seems to be closer to being an interpretation, as it is more theatrical than it is damaging.
