Zhalla'Klans are sexuate sentient humanoids with a biology based on cristals that developed an advanced pacific non-expansionnist civilisation. Zhalla'Khans are extremely long lived, able to survive in the void of space, capable of faster-than-light movement through interestellar space, of matter and energy manipulation and transmutation of living matter. They also possess a precognitive sense that allow to detect "fortuitous points in (their) destinies" such as meeting potential mates. Only one Zhalla'Klan is known to have left his homeworld. It passed on Earth in 1981.
Source: Marvel Universe: Marvel Two-in-One#79 ( September 1981).