Board Thread:Questions and Answers/@comment-4441317-20161207154019/@comment-4651179-20161208021023

The Darkforce is a interdimensional source of power used by characters like Darkstar. Similarly the Nova Force is used by the Novas, the Power Cosmic by Silver Surfer and others (though I'm not entirely sure you'd count them considering you said no cosmic demigods, but then again, I'm not sure Power Cosmic users can be considered a "demigod" but simply beaucoup powerful), the lesser-known Parker Particles by Alpha, and the Uni-Power by Captain Universe. However, all these last four aren't interdimensional.