Sauce: Dark Matter/Concentrated Evil edition

I saw u/Spare_Owl9278's post for Toothpaste: Lord Garmadon Edition, so I decided to jump on the train xD It is some new sauce in Croatian McDonalds, from Black Onion and Pepper, and the image on delivery app didn't load up so I had no idea how the sauce or the package looked like... And then I see a PURPLE PACKAGE and im like no way, and then I open it and it's like Black and very thick and I'm like repulsed cuz it looks like Crude oil XDDDDDD.......But then I'm liek nah this is the...