Dear DovahQueen: Tome of Magic contains a chapter on Shadow Magic, which I feel could be refluffed into Void Magic fairly easily for a Spelljammer-like campaign. If you were going to make a character that used Void as their magical power source, how would you do it? — Katie Shadow
Dear Shadow: Void magic is an area of tabletop RPGs that doesn’t often get a spotlight, but normally has a few options out of the gate. Depending on your core game, a Void focused spellcaster shouldn’t be too hard depending on how you want to play it. In 3.5 you had the Entropomancer from Complete Divine that had Void magic at its very core. The problem with Tome of Magic was that, while incredibly fun and excited, it didn’t balance well into the core game. In Pathfinder, your out-the-box options for a Void focused caster are a Void domain for divine casters, a Void elemental school for arcane casters, and a Void mystery for oracles. With some minor/moderate balance tweaks, the 3.5 and PF content could be interchangeable.
And, or course, there’s always reskins. If you fell in love with the Shadowmancer of ToM, there’s literally no harm whatsoever in simply making the declaration that instead of shadow magic, they cast, play, and function the exact same way except it uses void instead of shadow. Hell, if you were playing an evil Candyland game, you could arbitrarily declare it to be a chunkypeanutbuttermancer!
That’s the joy of tabletop rpgs!