Waterio is the Seventh boss you will face and its element is Water/Air so it is ineffective against Air/Earth types. You can face it in the Writhing Cascades or at the Summoning Stone. If you beat it 10 times, you will get the achievement Storm Chaser.



Element: Water/Air

Max health: 330

Drops: Typhoon Gems and Chunks of Coral

Exp: 779

Summon cost: 12 Gems

Typhoon Gems can craft Atlantean Avenger Armor which is a water/air armor,  Chunks of Coral can craft Seafoam Armor which is a mono water armor.