Throughout the history of Magic: the Gathering, Karn has been involved in numerous events and has traveled to different planes of existence. While he does not have a permanent home or base, he has had strong connections to certain locations and planes. Here are a few notable places associated with Karn:
1. Dominaria: Dominaria is Karn's home plane and the setting for many of his adventures. It is a world rich in history and magic, and Karn has deep ties to various locations on Dominaria. Notably, he has been associated with the continents of Terisiare and Otaria, where he has often intervened in significant events.
2. Mirrodin: Mirrodin is a plane characterized by its metallic landscape and abundance of artifacts. Karn was instrumental in the creation of Mirrodin and the sentient artificial beings known as the Mirari. He has a profound understanding of the plane and its unique properties.
3. New Phyrexia: New Phyrexia is a corrupted and transformed version of Mirrodin after it was invaded and assimilated by the Phyrexians, a technologically advanced and deadly civilization. Karn has been deeply involved in the conflict against the Phyrexians and their attempts to conquer other planes.
4. The Weatherlight: The Weatherlight was a sentient starship created by Urza and played a crucial role in Karn's journey across planes. It acted as a mobile base for Karn and his fellow Planeswalkers, allowing them to travel to various locations and confront various threats.
5. The Tolarian Academy: The Tolarian Academy was a prestigious school for mages located on Dominaria. Karn has had associations with the Academy and sought knowledge from its sages to further his understanding of magic and artifice.
It's important to note that Karn is a Planeswalker, and his travels take him across different planes, often for short durations or specific missions. Therefore, his presence in a particular location may vary depending on the events and storylines within the Magic: the Gathering narrative.