Legendary Forge

The Legendary Forge is the Blacksmith's workshop, where he upgrades found Gear permanently with Cells.

Upgrading and Gear levels
The way upgrading gear works in Dead Cells is by a level mechanic which can be fueled with Cells. There are three levels of gear that can be achieved with the Legendary Forge:

Level + : Makes your gear overall a bit stronger, Cells make it so the percentage of + items found is higher, its maximum can be reached after spending 800 Cells on the Forge. Can be upgraded to ++.

Level ++ : Makes gear much better and adds a stat scroll to it. Requires 3000 Cells to reach its maximum, can be upgraded to S.

Level S : Makes your gear really, really powerful and adds two stat scrolls to it. Requires 10.000 Cells to reach its maximum, and cannot be upgraded.

Access
The forge only appears twice in a run: after the Black Bridge/Insufferable Crypt, and after the Clock Room/Guardian's Haven.