The Eldar in Warhammer 40,000 are an ancient and highly advanced alien race, known for their incredible psychic abilities and sophisticated technology. Once the dominant species in the galaxy, their empire collapsed due to their own excesses, leading to the birth of the Chaos God Slaanesh and the near-extinction of their civilization. Now, the Eldar are a scattered and declining race, with different factions like the Craftworld Eldar, who live on massive, self-sustaining starships, and the Drukhari (Dark Eldar), who have embraced cruelty and live in the dark city of Commorragh. Despite their dwindling numbers, the Eldar remain formidable opponents, using their agility, speed, and psychic prowess to outmaneuver and outthink their enemies on the battlefield.