What to know
-
This method hinges on starting a world in Hardmode via the tooeasy secret seed, so you can roll Hardmode ores immediately.
-
The i am error seed can alter underground cabin chest loot so you can find a Chlorophyte Extractinator far earlier than usual.
-
A Chlorophyte Extractinator processes Desert Fossil, Silt, and Slush and can output Hardmode ores when the world is in Hardmode.
-
You can use Shimmer to transmute certain items, including converting a Chlorophyte Extractinator into 18 Chlorophyte.
Terraria 1.4.5 enables a pre-boss Chlorophyte route if you are willing to generate a special world and lean on extraction plus Shimmer transmutation to jump your progression.
| Goal | What you use | Where you do it | What you get |
|---|---|---|---|
| Start Hardmode without bosses | Secret seed tooeasy | World creation | Hardmode state from the start |
| Get a Chlorophyte Extractinator early | Secret seed i am error | Underground cabins and chest loot | Chlorophyte Extractinator |
| Generate Hardmode ores pre-boss | Chlorophyte Extractinator + Desert Fossil/Silt/Slush | Any safe setup near base | Mithril/Orichalcum + Adamantite/Titanium ores (depending on rolls) |
| Turn results into usable progression | Shimmer | Aether Shimmer pool | Ore conversions and Chlorophyte from Extractinator shimmer |
How the pre-boss Chlorophyte route works
In a normal playthrough, Chlorophyte is gated behind deeper Hardmode progression, but the key here is that the Chlorophyte Extractinator is a Hardmode-grade upgrade that can be obtained through world generation quirks and then exploited immediately if your world is already in Hardmode.
Once you have it, feed it Desert Fossil, Silt, or Slush to produce outputs faster than a standard Extractinator and, in Hardmode, it can produce Hardmode ores from that input.
Locations involved
You will mainly bounce between the Underground Desert for Desert Fossil farming, underground cabin areas for the altered chest item, and the Aether Shimmer area to do the transmutations that turn your ore pile and the Extractinator itself into what you actually want to craft with.
How to get Chlorophyte pre-boss in 1.4.5
Step 1: Create a world that starts in Hardmode
Make a new world using the tooeasy secret seed so the world begins in Hardmode without you defeating bosses first.
Step 2: Add the seed that enables the early Extractinator setup
Use i am error in the same world setup so you are playing in the world variant that changes underground cabin generation and can lead to Chlorophyte Extractinators appearing there.
Step 3: Rush the Underground Desert and stockpile Desert Fossil
Head to the desert and dig down into the Underground Desert, then mine Desert Fossil until you have a large stack; around 500 is a practical target if you want enough rolls to matter.
Step 4: Find multiple Extractinators if you want faster processing
While you are in the Underground Desert, keep an eye out for standard Extractinators as well, since having multiple machines speeds up processing a big fossil stack.
Step 5: Secure a Chlorophyte Extractinator from underground cabins
Explore underground cabin areas until you obtain a Chlorophyte Extractinator, which can appear due to the worldgen changes tied to this setup.
Step 6: Process Desert Fossil to roll Hardmode ores
Use the Chlorophyte Extractinator to process your Desert Fossil in bulk; because your world is already Hardmode, the outputs can include Hardmode ores.
Step 7: Use Shimmer to convert outputs into what you need
Bring your results to Shimmer and transmute as needed, including turning the Chlorophyte Extractinator itself into 18 Chlorophyte if your goal is Chlorophyte material rather than long-term ore processing.
Step 8: Craft your early Hardmode stations and gear
With your early Hardmode ore supply, craft key progression stations like a Mithril Anvil and then build whatever early Hardmode tools or armor you are targeting.
Rewards
| Reward | What it enables | Why it matters pre-boss |
|---|---|---|
| Chlorophyte (via Shimmer) | Chlorophyte bars and Chlorophyte-tier crafting access | Lets you touch Chlorophyte materials without boss kills in this setup |
| Hardmode ores from extraction | Early Mithril/Orichalcum and Adamantite/Titanium crafting paths | Skips the usual pre-Hardmode bottleneck by starting Hardmode immediately |
| Faster extraction pipeline | More rolls per minute with the Chlorophyte Extractinator | Makes large fossil stacks worth the time investment |
Keeping the run practical
Starting in Hardmode changes the difficulty curve immediately, so plan to secure basic mobility, lighting, and a safe processing area before you commit to long fossil grinds.
If you are doing this mainly for Chlorophyte, decide early whether you want to keep the Chlorophyte Extractinator for continued ore generation or shimmer it for the direct Chlorophyte payout, because that choice changes how you scale your resources.
If you are comfortable using secret seeds, you can reach Chlorophyte materials and Hardmode ore crafting pre-boss by starting in Hardmode with tooeasy, obtaining a Chlorophyte Extractinator through i am error worldgen behavior, then rolling ore via Desert Fossil and finishing with Shimmer conversions.
