The Aqua Sac is a monster material that youll need to build some powerful water items in Monster Hunter Wilds. But youll have to kill a desert-dwelling worm to collect it first.In this Monster Hunter Wilds guide, we tell where to find an Aqua Sac and what weapons and armor you can craft with it.How to get an Aqua Sac in Monster Hunter WildsThe Aqua Sac can be found from the low-rank Balahara only, which youll be able to fight as the fifth main story encounter in Wilds. The Balahara lives in the desert plains, and can burrow underground and rise up to attack.Theres only an 18% chance for a Balahara to drop an Aqua Sac, which means you might end up needing to hunt additional monsters to get an one (or more).What to use an Aqua Sac for in Monster Hunter WildsAn Aqua Sac can be used for the Balahara Vambraces armor piece. But more importantly, an Aqua Sac is essential for crafting many different water-based weapons. The below weapon types all have a Balahara tree and require a Aqua Sac to craft their Balahara variant.LanceSword and ShieldHammerInsect GlaiveHunting HornGun LanceA weapon with water attacks will be essential in the Oilwell Basin fights with the Ajarakan and the Nu Udra (aka the black flame); both are fiery monsters with a weakness to water attacks. Unlike the Flame Sac and Frost Sac, there is no High Rank version of Aqua Sacs.Need help navigating the Forbidden Lands? OurMonster Hunter Wildsguides can outline your progress with ourmain story walkthroughandmonster listahead of reachingHigh Rank, help you settle on an armament with ourweapons listandbest weaponsexplainers, and teach you how to uncoverores,bones, and getmonster tails.