The Etherlords games are a mix between a singleplayer CCG and Might and Magic.
There is a Multiplayer mode as well where you have immediatelly access to all cards / items and get to play in different "weight classes" (e.g. 1000 / 5000 point armies similar to some tabletop games like Warhammer).

Includes Etherlords and Etherlords II!

Etherlords:

Four races of wizards, adepts of four magical schools, collide in a brutal fight for world domination. Etherlords, an iconic strategy created by Nival, became a bestseller in the world and earned highest grades from critics.

Etherlords is an exciting mix of turn-based strategy and fantasy trading card game. Innovative game mechanics that first appeared in this game formed the basics of most modern games of this genre.

Features:

4 races of magical creatures, each with their own unique lands, architecture, spells and strategy;
2 battle campaigns for each two allied races;
More than 300 spells, including sorcery, battle magic, summoning and rituals;
More than 10 game levels, all connected by one storyline;
64 heroes of all races; their parameters, special abilities and selected skills progress with each level gained.
Individual battle style for each hero with the help of their unique sets of spells;
A combination of magical battle system based on table games and strategic use of resources;
Full 3D turn-based battles with unlimited variety of tactical decisions;

Etherlords II:

The saga continues! Etherlords II takes you back to the world of Ether and into a whole new realm of fantastic possibilities. Lead your hero on an unforgettable journey through lands filled with unsurpassed beauty and danger to unlock the ultimate mystery.

Etherlords II is an exciting mix of role-play and tactical turn-based combat in the best traditions of fantasy trading card games.

This version of the game supports co-op battles via Internet, including Round Table mode: round robin elimination tournament with random set of cards.

Features:

Five campaigns covering a magnificent fantasy world
Hundreds of spells and creatures combine to create nearly unlimited tactical possibilities
New monsters and magic that can be used by any of the four races
Enhance your Hero’s skills throughout each campaign with new spells, creatures and abilities.
Non-linear missions with multiple paths to completion
Thorough tutorial system to help you learn basic and advanced dueling tactics
5 multiplayer modes. A dedicated master server that calculates and maintains your statistics and ratings