The spell may only be learned from a scroll of Waterga II, which can be purchased from the merchant Susu in Lower Jeuno for 13,050 gil. Scrolls also drop off of Sapphire Quadavs and the Bistre-hearted Malberry notorious monster. In addition, it can also be purchased from the player Auction House under the Black Magic category.
Waterga II is the tier 2, area-of-effect, Water-based elemental spell. It does damage to all creatures within a certain range of a specific target.
The spell can be used by a player's sub-job once their main job reaches level 88.