Arisian

The Arisians are an ancient race of powerful telepaths native to the planet Arisia. They are the creators of the Lenses used by the Galactic Patrol of the Lensman series.

Anatomy
In their original state, Arisians strongly resembled humans. However, after their billions of years of physical and mental evolution, they look like large brains, with only a few extrusions for locomotion and eating.

Powers & Abilities
Arisians possess immensely powerful metal abilities. They can communicate with and manipulate the minds of other creatures from great distance, and even kill them outright with purely mental force. They can also make themselves look like anything an observer can imagine, even appearing as different things to the same observer at the same time.