Gaming

There's an indie rogue like wizard game called Fictorum that I really enjoy. It can be a little indie jank but you really feel like some kind of badass wizard jumping around throwing meteors and completely blowing apart houses and enemy towers with physics.

There are a ton of different kinds of customizable spells like other games in this thread, but its unique point is that you can add runes that allow you to shape magic. When you cast and hold you can move the mouse in a direction to activate one of your runes, sometimes it might multiply your projectiles, or make them larger, or make them explosive. Being able to modify the spells on the fly in combat is something closer to Magicka's freedom of spell creation, though not quite as crazily variable.