From MTG Salvation Wiki
Krov, besieged by plague. Art by Liz Danforth.
Krov was the capital city of the kingdom of
Kjeldor on
Terisiare in
Dominaria near the last five hundred years of the
Ice Age. Once a center of learning famed for its elementalist
wizards, it was ravaged by plagues after the
World Spell triggered
the Thaw, creating a warmer climate in which disease proliferated.
Vampires and
zombies infested the city, ruled by the powerful
Garza Zol, Plague Queen. Krov's vampires and elementalists joined forces with the
Cult of Rimewind, who used Krov's libraries to locate
Phyrexian war machines, but when the cult's leader
Heidar turned on them, Zol ordered his assassination. What came of Krov afterwards is unknown.