Kronans are an ancient race of rock-like humanoid beings.
One Kronan warrior was a member of the Marauders, and was present during the battle against the Asgardians on Vanaheim in 2013. The Marauder attempted to duel Thor, but was destroyed with a single uppercut from Mjølnir.
Korg, a Kronan, was punished to be a gladiator for Grandmaster for the Contest of Champions. After his acquaintance with Thor, Korg led a rebellion against Grandmaster and escaped the planet of Sakaar to join the Asgardians on their quest to Earth. In the aftermath of the Snap, Korg remained by Thor's side on New Asgard. During the Battle of Earth, Korg joined the rest of the heroes fighting Thanos' army.
In the alternate universe where T'Challa became Star-Lord, the Collector had hacked off the arm of Korg and used it as a weapon against escapees from his collection, including T'Challa. However, when T'Challa got hold of the Kronan arm and used it as a shield, the Collector quickly destroyed it with a dagger forged in Dark Matter, which he had taken from Malekith.
Kronans are tall humanoids that tower over other races such as Asgardians and Vanir. Much of their body's epidermis is composed of highly durable rocks that provide them superhuman strength and allow them to withstand many attacks. Because of this, Kronans eschew most forms of armor in battle.
- In the comics, the Kronans are also known as the Stone Men from Saturn, although they are native to the planet Ria. They were introduced in Journey into Mystery #83, the same issue that introduced Thor.