Titan's Rift

The Rift is a gigantic gas cloud riven through by the passage of a rare stellar remnant, a low-mass black hole. Its passage has churned a gash through the cloud, spurring the ripples of what will become new star incubation nebulae, but the black hole is approaching the end of its life, not having enough mass to defy Hawking Radiation for long.

The top of the gash is wide, from when the hole had greater mass, and tapers to a narrow tip at its current location.

It is steadily getting brighter and brighter as it travels, and within a few decades will disappear in a blinding flash, blowing a great hole in the nebula.

For now, it represents a profligate source of energy, and for those strong enough and daring enough to try and claim it, could become a valuable resource indeed...