The Leamonde Entite is an enemy in the game Final Fantasy XII. It is the Dark-elemental Entite. It spawns in the The Slumbermead area of the Nabreus Deadlands during heavy fog. It can usually can be found in the northern or eastern areas of the zone.
The gods gave Man the darkness so that he might sleep in peace, wrapping it around him as a blanket against the harsh light of day. The darkness reminds us of death, and thus, of sweet life. The darkness gives tone to the world, rich and varied. Yet Man learned to hide in the shadows whence to do evil, and he summoned demons from the darkness's depths, mocking the gods' work. So did the gods fashion the Leamonde Entite, that Man might fear the darkness, sowing in his heart the terror of the night.
The power of darkness is a mighty power. Yet it is as arrogant as it is tremendous, ever seeking to depose holiness and rule alone. Shine a holy light upon it until there is no shadow left in which to hide, for only then can the arrogant darkness be tamed. The darkness will swear fealty to you, and offer up the shining electrum to your hands.
The Leamonde Entite uses a different attack pattern from most Entites. It no longer uses Silencega. It instead uses Fearga to drain the entire party's MP. It still uses Sleepga and attacks with Darkra and level 3 spells. When it gets low on HP, it changes its attack pattern and uses Darkga instead. Reflect will not work against it, as its spells ignore Reflect. Also, like the other Entites, it is docile, but attacks when provoked or when Magick is used nearby.
The Leamonde Entite is named after the infamous ghost town of Leá Monde from Vagrant Story. Leá Monde is a town infested with the undead, a typical city of darkness. The Vagrant Soul, a rare game form of the Leamonde Entite, is also named for the game.
The Japanese name "Ryosuarubu" (リョスアルブ), resembles the old Norse "Ljósálfr" which means "Light Elf". Even though it contradicts with Dark-elemental in-game, it directly mirrors "Dekuarubu" (Diakon Entite in English version) which is the Romanization of "Dökkálfr", the "Dark Elf", but Holy-elemental in-game.