Conquest of Elysium 3 is an old school turn based fantasy strategy game. You start by choosing one of 17 different characters, e.g. Necromancer, Demonologist, Dwarf Queen, Troll King or maybe a High Priestess of Ba'al. The different character classes vary wildly in what special abilities they have and what parts of the world they should focus on conquering. E.g. the Demonologist needs sacrifices that you gain from towns and villages, but the Druid want special herbs that are found in forests. But of course gold is always good to have, so all classes can make use of a gold or silver mine, but only the Enchanter can make a Gold Golem out of it.
The Witch can use fungus to summon a Catoblepas whose gaze can annihilate an entire row of enemies per turn. The Demonologist can summon powerful demon lords, but only if he is reckless because the likelihood of a demon lord attacking his summoner is quite high. Careful Demonologists make use of the lesser summoning that are also powerful when compared to mortal men. The Warlock can summon an immortal Phoenix. The Phoenix explodes when it dies and then swiftly reforms in the home citadel of its owner. In short the main thing about this game is the amount of features and special abilities that can be used.
Someone described the game as a strategy roguelike and I think that is a quite good description. It plays fast and you can die quickly if you are unlucky. Worlds are randomly generated, so no two games are the same. It is also an unfair game, random events can wreak havoc upon the world and game changing monsters or locations can be encountered.