If you have a subscription, many versions of Univers are included in Adobe Fonts (formerly Typekit). You are not "downloading" a desktop file forever, but you can sync Univers Black to your apps for use in personal and commercial projects as long as your subscription is active. This is the best legal route for most designers.
In this extensive guide, we will explore the history of the Univers family, why the Black weight is so effective, and—most importantly—how you can download and use this font legally and safely. univers black font free download