Three Donkeys today announced that Spectromancer, a turn-based online fantasy card game, co-designed by Magic: The Gathering's Richard Garfield and Alexey Stankevich, creator of Astral Tournament and Astral Masters, is now available via Steam, for $19.99. Spectromancer allows players to participate in a magical duel against other mages by strategically summoning creatures and casting spells in either single-player or online multi-player modes. A playable demo is locally mirrored here.