Black Ram: how to get the mount in WoW Forever
Black Ram is a mount from Classic that returns in World of Warcraft: Forever. It is a very fast mount from level 40. You learn it from one of these items: 
Harness: Black Ram and Black Ram.
In short
| Item | Harness: Black Ram, Black Ram |
| Source | Not known yet |
| Level | 40 |
| Riding | Ram Riding |
| Speed | very fast |
| New in Forever | no, from Classic |
| Account-wide | yes, according to the tooltip on the beta |
How to get it
The files of the WoW Forever beta hold this mount, but where it comes from is not known yet. This page gets updated as soon as the beta or the launch shows it.
Riding it needs Ram Riding.
The game hides this mount in the mount collection until a character has learned it.
What changed since Classic
The item now teaches the mount: it becomes a spell, no longer takes a spot in your bags and counts for every character on the account, according to the tooltip on the beta.
More mounts with Ram Riding
Every mount of WoW Forever, with where it comes from, is in the mount guide.
Frequently asked questions
How do you get Black Ram in WoW Forever?
The files of the WoW Forever beta hold this mount, but where it comes from is not known yet. This page gets updated as soon as the beta or the launch shows it. Riding it needs Ram Riding.
Is Black Ram new in WoW Forever?
No. Black Ram was already in Classic and returns in WoW Forever.
Sources: Wowhead