Pentel GraphGear 1000, Sakura Pigma Micron 003 & FB on 250 g/m² beige toned paper

Even the best blade will rust and grow dull unless it is cared for.

(Klingon proverb)

blade {noun} /bleɪd/

the flat part on a knife or similar tool or weapon, with a very thin edge used for cutting. Bunnies, for example.