Master of Magic was an old MSDOS/early Windows era turn-based strategy game similar to Civilization. I came across it in 1996, and I spent a ton of time playing it. There a few different types of magic that you farmed from natural areas. As with Civilization, you created alliances, did research, and expanded your power. Once you took over the world, there were portals to the dark world where you faced your true adversary, a lizard-like race.

Fun stuff...miss that game quite a lot.