Vanishga is an area-of-effect spell that renders all nearby allies invisible.
In the original version, Vanishga is Arcane Magick and an upgrade to Vanish. Vanishga inflicts the invisible status to all allies in range for the (initial) cost of 60 MP. The Arcane Magick 6 license costs 70 License Points. The spell is bought in Rabanastre, Nalbina, and Phon Coast for 8,700 gil.
In the Zodiac versions, Vanishga is listed as a Time Magick 8 license costing 90 LP. Its MP cost is reduced to 24, and it is available for 3,800 gil at the Mosphoran Highwaste, and from a treasure in Trial Mode Stage 76 with the Diamond Armlet equipped. Vanishga is available for the Time Battlemage and Machinist job classes, although Machinist must obtain the license for Famfrit first.
Vanishga appears as an ability learned by Llyud at level 25. The ability renders all selected allies within an area-of-effect invisible.