Wikipedia
Etherlords is a fantasy turn-based strategy and card-dueling series for the PC, by Russian developer Nival Interactive. The first game was published November 12, 2001 by Fishtank Interactive. Prior to worldwide release it was released in Russia (November 9, 2001) as Demiurges . It was followed two years later by a sequel, Etherlords II, which was published in Europe by DreamCatcher Games and in North America by Strategy First. Nival has stated that a third game isn't out of the question, but so far nothing has been announced.
The game features a card-based dueling system that borrows heavily from Magic: The Gathering. While the game can be played in a pure dueling mode, the major appeal of Etherlords stems from the scenario mode which utilizes a strategy/adventure map, similar to the one used in Heroes of Might and Magic. Nival later became the developer of HOMM 5.