Ink

Ink is pure black, down to the color code. It is a Basic aura from Era 7, made by 53_Axis, rolling at 1 in 700 with no biome tied to it, so you will see one about every 700 rolls at 1x luck and every 70 at 10x. The Sol's RNG Wiki notes it is one of the auras that uses exclusively the hex color #000000.

On screen, clouds of ink surround the player and drip into a big black puddle on the floor, with splatters of the same color forming around it while a dark aura spreads from the inside out. The wiki says the smoke resembles the old Forbidden aura, only denser and more visible. The title is set in Merriweather, and the quoted description is simply paint it all black.

Ink is mostly a crafting piece. The wiki lists it for the Dark Matter Device (1), the Flesh Device (190) and Darkshader (22,000), so duplicates are useful. It has two mutations, Ink : Leak and the Summer 2025 pass reward Ink : PaintballGun, which keep the ink theme with bigger changes.