Cells and unlocks
Invest cells in the Legendary Forge after a boss
Turn ordinary-run cells into persistent improvements to future gear quality.
WHERE & HOW TO FARM
Invest cells in the Legendary Forge after a boss
Blacksmith passage after a boss biome during a normal run.
Before you go
- Reach a boss and continue to the following passage.
- Carry cells to the Blacksmith.
- Have a Legendary Forge upgrade available for investment.
Farming steps
- Collect cells while clearing the route to the boss.
- Defeat the boss and enter the following passage.
- Locate the Blacksmith and inspect the Legendary Forge option.
- Review the available upgrade and determine whether quality progression is your current priority.
- Invest the cells you want to commit to the Forge.
- Continue the run knowing the improvement applies to future gear drops.
- Repeat in later runs when another investment is available and you have cells to spare.
- Invest when you expect to play more runs and want better quality gear over time.
- Balance Forge payments against Collector unlocks if you still have important blueprints to purchase.
Repeat, collect and use
Repeatable while Forge upgrades are available. Purchases persist, but each upgrade is a limited progression step rather than an endlessly repeatable reward.
Common mistakes
- Expecting a specific weapon from the Forge; it improves the chance of higher-quality future drops.
- Skipping the investment point and carrying cells into danger; spend at the Blacksmith when the upgrade is worthwhile.
- Treating it as the same purchase as a Collector blueprint; choose according to whether quality or a specific unlock matters more.
When to stop or switch
Stop investing when the next available Forge progression is complete or a desired Collector blueprint becomes the better use of cells.
Sources & fact checks
What you can get here
Open a guide to find other locations and see what the item is used for.