Adhesive Tattoo

This tattoo's ink sticks to the surface of the flesh. When a creature misses an attack against you, you can use your reaction to extrude an inky sludge. The attacking weapon or appendage becomes stuck and cannot be used until the creature uses their action and succeeds on a DC 15 Strength check to pull it free. 

Tattoo Attunement. To attune to this item, you hold the needle to your skin where you want the tattoo to appear, pressing the needle there throughout the attunement process. When the attunement is complete, the needle turns into the ink that becomes the tattoo, which appears on the skin. If you have multiple magic tattoos, they count as a single magic item with regard to the number of magic items you can attune to. If your attunement to the tattoo ends, the tattoo vanishes, and the needle reappears in the closest unoccupied space to you.