Magic & Mayhem, also known as Duel: The Mage Wars (US), The Art of Magic (Russia), Mana: Der Weg der schwarzen Macht (Germany), Duelo de hechiceros (Spain) and Arcanes (France), is a fantasy/mythology-themed real-time strategy game designed by Julian Gollop and developed by Mythos Games.
The player's primary character is their wizard, and who can cast spells, summon creatures and (in the campaign) interact with other characters. The wizard and any summoned creatures are controlled, as in most strategy games, by dragging selection boxes and using the mouse buttons to interact and issue orders. Casting spells and summoning creatures uses mana. Wizards replenish their mana by occupying "Places of Power" with their creatures, or using up one-use "mana sprites" that are picked up around the map. Magic and Mayhem is built into an isometric grid, with creatures occupying (or flying above) squares on the board.
The game includes two game modes; the campaign progression and a "quick battle" option, similar to a deathmatch. The campaign is single player only, but quick battle can be either single or multiplayer over a LAN network.
Source: Wikipedia, "http://en.wikipedia.org/wiki/Magic_and_Mayhem," available under the CC-BY-SA License.