It Cosmetics Tightline Waterproof Full Lash Length Black Primer Mascara - $24 - a waterproof mascara with a built-in primer and lash enhancing serum containing proteins, biotin, callagen, olive, jojoba, avocado and peptides.
It has the tiniest little brush that I've ever seen on what is meant to be a regular mascara which means the mascara needs to be applied in a certain way in order to do the job properly.
Starting at the root of your lashes, hold the wand horizontally, then wiggle and sweep the brush up and through your lashes from the very base through to the tips. Add additional coats for more drama and it can be worn alone or under mascara as a primer.
For a more visible eyeliner effect, lightly and gently press the wand along the root of your lash line filling in the gaps between your lashes, move along the entire upper line for an eyeliner effect - which sounds easier then it is, as hard as I tried I could not make mine look like the model in their promo pictures - I ended up either jabbing the wand in my eye or getting mascara all over my eyelid, I obviously need more practice. I like the little brush though, it makes it much easier to hit all the lashes without getting mascara on my skin!