Shadow:
You are slightly translucent and nearly fully invisible in the dark. You may enter shadows warping across connected dark areas. You may also submerge your limbs into the darkness allowing you to make multiple copies that protrude out.
Shade:
You fan become a low crawling fog, if someone breaths in the fog they grow tired and pass out. If your true body is hit within the fog or the fog is disspated you will be pulled out of that form for a short time.
Skewers: you can generate sharp skewers ranging from 1/24th of an inch to 2 inches wide. They come out of the surface of the skin or can be protruded from the ground around you (they disappear once you stop focusing) HOWEVER if these spikes hit a person, they lose function in that body part for a time. (complete loss of function / full paralysis for head shots)
Tattoo: you can imprint crests onto others or yourself with the ink like mixture your skin produces, these effects act as natural quirk strengthening body reinforcement or some other aspect (usually just based upon author choice)
Tattoo sleeves-act similar to armament haki and shatter when hit to hard but prevent damage to the person.
Additionally, you may also inflict debuffs making people tired weak or decreasing their quirks power with your ink by drawing on them.
You may also apply simple effects such as
Downwards arrow-create a short duration immense gravity forcing them down (works for other directions)
Palm print-pull the target to your palm (almost magnetic)
You can also perform short range shots of ink. This ink is highly inflammatory for the eye and delicate skin areas.