Double, double, toil and trouble; Fire burn, and cauldron bubble.
A witch don't need to do anything - they just are. Summon some magic when leaving your crypt with the 'Cauldron' handbag; in a faux-leather body with contrasting silver pentagram hardware to the front, satin pouch closure, and a long chain shoulder strap. Fully lined. Fits yer essentials whilst still keepin' it light.