Bitter Flour Farming: Bonecrusher Vanguard | Endfield

Bitter Flour Farming: Bonecrusher Vanguard Spawn Locations and Routes

TL;DR - Key Points

Bitter Flour drops from Bonecrusher Vanguard enemies (shielded Landbreaker variant)
10 drops needed to complete the Crafting Manual
6 spawn locations on the map, all above ground in Originium Science Park
30-minute respawn timer for each spawn point
Only elite variants drop Bitter Flour — regular Landbreakers do not
Power Plateau Alluvium offers the fastest AFK farming method
Gilberta + Wulgard combo recommended for easy overworld clears
Farmable in around 2 days even with average drop luck

What You’re Looking For

Bitter Flour is a crafting material needed to complete the Crafting Manual in Arknights: Endfield. It only drops from Bonecrusher Vanguards — the shielded variant of the Landbreaker enemy family. Regular, unshielded Landbreakers will not drop this material.

Drop rates are not guaranteed from every elite kill, so budget for multiple farming runs. With 6 spawn points and a 30-minute respawn, most players can complete their quota within 1-2 days of focused farming.

Spawn Locations

Map: Originium Science Park Total spawns: 6 Bonecrusher Vanguards

All six spawn points are above ground with no underground areas, no parkour, and no hidden mechanics required. Bonecrusher Vanguards stand out in the open, making them easy to identify and engage.

#	Location	Terrain	Notes
1	Originium Science Park	Above ground	Visible on map, straightforward approach
2	Originium Science Park	Above ground	Visible on map, straightforward approach
3	Originium Science Park	Above ground	Visible on map, straightforward approach
4	Originium Science Park	Above ground	Visible on map, straightforward approach
5	Originium Science Park	Above ground	Visible on map, straightforward approach
6	Originium Science Park	Above ground	Visible on map, straightforward approach

With 6 spawns and a 30-minute reset timer, you can clear all points, wait half an hour, and repeat. This loop is very forgiving even with unlucky drop rates.

Farming Methods

[RECOMMENDED] Power Plateau Alluvium (AFK)

The fastest hands-off method for farming Bitter Flour:

Lower exploration level to 5 (enemies cap at level 50)
Place combat/defence towers around the area
Bonecrusher Vanguard spawns in wave 1 — you can quit after the first wave
Farmable up to 9x per day
Most players can complete their 10-drop quota in around 2 days

This method requires minimal setup and lets you AFK while the towers handle combat.

[ALTERNATIVE] Originium Science Park Overworld Route

The traditional overworld farming approach:

Clear all 6 Bonecrusher Vanguard spawn points
Wait 30 minutes for spawns to reset
Repeat until you have 10 Bitter Flour drops
All locations are above ground with no navigation tricks needed
Gilberta + Wulgard combo recommended for easy clears

Without Gilberta + Wulgard, bring your strongest available team to handle the shielded elites efficiently.

Bonus: How to Find Any Farming Location Yourself

Use the Endfield Hub database to locate drops for any crafting material:

Go to Database → Item Files → Gatherables Find your item and note the “dropped by” enemy type
Go to Database → Threat Files Search for that enemy type
On the enemy page, open the Distribution section on the right side
Click any listed area name — the map will center on that region

This workflow lets you self-serve farming locations for any item in the game.

Heads Up: Hollow Aggarit

If you’re working through the Crafting Manual, prepare for Hollow Aggarit — the hardest item in the entire manual. It drops from flying crystal enemies with very few overworld spawns and a low drop rate. Expect to farm heavily at the Energy Alluvium in Origin Lodespring for all 20 required drops.

BITTER FLOUR FARMING: BONECRUSHER VANGUARD | ENDFIELD