Heavy Iron Key is a Key Item in Dark Souls 2.
| A piece of iron shaped like a key.
Past the altar deep within the Iron Keep and through a door is the tower that the Old Iron King used to produce iron.
The unearthy weight of this chunk of iron is a reminder of the Iron King's own immeasurable strength.
- Added to inventory after buying the DLC.
- In Scholar of the First Sin, the key is located on a skeleton in the pit with the Flame Lizards in the Forest of the Fallen Giants.