Entrance
Inside Blackrock Mountain; meeting stone at mountain entrance.
Loot and attunement
Classic Molten Core attunement (Attunement to the Core) is obtained here; unknown in Forever since MC is not yet open. Forever-wide dungeon changes (not stated per-dungeon): Blizzard says 'Every dungeon drop has been re-examined... hundreds of new drops have been added. Unique dungeon boss items are now blue quality' (Official); dungeon mob-kill XP 'brought way down', dungeon quest XP 'much, much, much higher' (Kris Zierhut, Confirmed interview); Meeting Stones do not summon, they open a Looking for Group tool (Kotaku interview).
Description
Dark Iron capital Shadowforge City. Molten Core is entered from within BRD in Classic.
Forever evidence
No Blizzard statement names this dungeon. Warcraft Tavern's Forever guide: 'World of Warcraft Forever brings forth all Classic dungeons, alongside 9 new' and lists it (third-party).