I think it was after I finished the first level before entering Dronghur. I was probably switching screens between ship seect, back to main menu, then go to the ability screen. Moved cards around, then pressed space bar to see the screen didn't proceed forward.
For the Void Bullet, I think the effect does the job. My impression is that it is too all-encompassing. Blacking out the whole screen and turning down the volume down to zero almost instantaneously feel like it should affect everything on the screen. However, the ability only affect whatever in its trajectory. So there is the expectation discrepancy there on my part. What I imagined is a swirling blackhole effect that gets bigger as it moves forward, while distorting the background as it moves along, and also dimming the volume slower. But this is probably a matter of personal taste.
Good to hear that the story is only the first draft. Looking forward to the updates!