Contracts

Open to choose a Visage of the Khan-Ur. These helms can only be worn by charr.
Acquisition:
"Recovered" Charr Artifact
Unlocks the following:
Gaze of the Khan-Ur (heavy)
Glower of the Khan-Ur (medium)
Glance of the Khan-Ur (light)

Double-click to choose a Black Lion Chest exclusive item. Once chosen, the item will be account bound.
Acquisition:
Black Lion Chest (historical)

Double-click to open this package and receive an account-bound tonic.
Acquisition:
NPC Choya Pinata (Crystal Oasis).
Contents:
Endless Choya Pinata Tonic

Nightingale's Music Box is a music box.
Choosing the first button will play ambient music from the music box, everyone around you can hear this.
Choosing the second button stops the music from playing.

Double-click to transform into a random colored ooze for fifteen minutes. You will be unable to fight while transformed.
They were given by a mistake of a GM. Until the Festival of the Four Winds 2018, there were only 2 tonics in the game.
With the mentioned update, the existing tonics became account bound.