They are opened by being near them and pressing 'Space' on the keyboard.
They despawn if they are not looted after a few minutes.
There is a cubic version that drops from bosses and from some normal enemies. These Loot Cubes or Chests, can glow either green or blue in normal adventures, and can also glow purple in Group Adventures and Raids.
Spheric version (Orb)
- Class Sparks (1-3)
- Ether Cores (1-2)
- Sparks of Evolution (Instead of Class Sparks in certain adventures if you accept to play the promo class)
- Trophies (1)
Cubic version (Chest)