Architects of Gravity: What powers would someone who controls Dark Matter have?

Welcome, mystery seekers, to a new episode of The Kingdom of the Invisible! Today we are going to play at being gods of the cosmos. Imagine for a second that everything you can see, touch, and feel —stars, planets, your cat, this screen— is just the foam on a vast and deep ocean. In reality, 85% of the matter in the universe is something we cannot see, smell, or touch. It is dark matter, a ghostly substance that emits no light but holds galaxies together like invisible glue. But what if someone could manipulate it? Imagine a being we will call 'The Gravity Weaver'.

This is not a conventional superhero who shoots energy beams or flies with thrusters. The Gravity Weaver operates in the shadows of physics. Imagine walking down a busy street and, suddenly, an armored truck starts to crumple as if a giant, invisible hand were squeezing it. There are no wires, no magnets, no explosions. There is only an apparent void that weighs billions of tons. The Weaver doesn't need to touch the truck; they only need to concentrate a cluster of dark matter at that spot, creating a 'gravity well' so dense that the metal yields to the sheer curvature of space.

But that is not the most disturbing part. Imagine trying to shoot or capture them, but their figure distorts. The air around them seems to shimmer like asphalt on a hot day, but without the heat. The light that should bounce off them curves, surrounding them like water flows around a stone in a river, making them practically invisible or projecting their image where they actually are not. We are talking about controlling the very architecture of space-time. How is it possible that something we cannot even detect with our most advanced instruments could have such devastating power? Is it just science fiction, or are the laws of astrophysics already giving us the instructions to build this architect of gravity? Get ready, because to understand this, we have to dive into total darkness.