Elemental in a Bottle

The Elemental in a Bottle is a Hardmode accessory that has a 14.29% / chance to be dropped by Sand Elementals. Equipping it summons a Sand Elemental to fight for you, which deals summon damage and casts sandstorms in a similar fashion to their enemy counterpart.

Trivia

 * This item used to be called "Waifu in a Bottle", while the Sand Elemental herself used to be called "Sand Waifu". After that, they were known as "Lady in a Bottle" and "Miss Sandy", respectively.