A geomancy skill that inflicts damage with the power of the surrounding terrain.
Will-o'-the-Wisp (鬼火 or おにび, Onibi?), also known as Will o' Wisp, Will-o-Wisp, Ignis Fatuus, Elf Fire, or Demon Fire, is a recurring ability in the series. It is often used by ways of the Geomancer ability Terrain, and often deals Fire-elemental damage and inflicts Confuse to one or all enemies.
Will o' Wisp is an ability used exclusively through the Terrain command, and while the battle takes place on or at the Swampland, Caves, Pyramid of Moore, Mountain Caves, Interdimensional Rift, Istory Falls, Ship Graveyard, and Library of the Ancients. It deals unblockable Fire-elemental damage to one enemy with a 50% chance of inflicting Confusion.
Will o' the Wisp, originally called Elf Fire, is an ability used by Mog through his Dance ability, and has either a 2/16 chance of appearing during Forest Nocturne, 7/16 chance of appearing during Love Serenade, or a 2/16 chance of appearing during Twilight Requiem. It has a spell power of 72, is unblockable, and deals Fire-elemental damage to one enemy. The ability is also usable by the enemies Oversoul, Devil Fist, and Skull Dragon. Gau can use the ability after learning the Oversoul (Overmind) rage.
Will-o'-the-Wisp, originally called Demon Fire in the PlayStation version, is a Geomancy ability usable only when standing on the Wooden Floor, Carpet, Coffer, Stairs, and Wooden Deck tiles. It deals Fire-elemental damage and can inflict the Sleep status on all enemies within range of the targeted panel. It requires 150 JP to learn.
will-o'-the-wisp are atmospheric ghost lights seen by travellers at night, especially over bogs, swamps or marshes. It resembles a flickering lamp and is said to recede if approached, drawing travellers from the safe paths. The phenomenon is known by a variety of names, including jack-o'-lantern, friars's lantern, hinkypunk, and hobby lantern in English folk belief, and is well attested in European folklore.A
In the Japanese version, Will-o'-the-Wisp is called Onibi. Onibi (鬼火?) is a type of kaika in Japanese legends said to be the spirits born from the corpses of humans and animals. Sometimes the words "will-o'-wisp" or "jack-o'-lantern" are translated into Japanese as onibi.