Vexxians

The Vexxians are an extinct race of Sentient gas clouds.

History
The Vexxians are said to have been around since the beginning of the universe. This is unconfirmed due to the lack of any living specimens. But they gained knowledge as the universe lived on, and the Harmanians have said they were extremely intelligent. They watched over the development of the Kardonians.

Extinction
The Harmanian Cataclysm had taken out the balance of power in the Vexxian Nebula by an unknown aggressor long long ago. However, the Vexxians got the worst end of everything, being rendered extinct and their homeworld being destroyed, now an empty grave that people dare not venture to. The likelihood of some specimens of Vexxian being around today is highly unlikely.

Biology
In terms of biology, there was nothing to go around in terms of being "biological"; the Vexxians were literally gas clouds that could communicate telepathically with others. Telepathy was seen as the "core" of a Vexxian would glow brighter and then fade back to normal luminosity.

The Vexxians did not need to eat wonder why and could go their entire lives without hunger before they dissipated and died or their core was destroyed.