Guides / Essence Reference
Essence Reference
Complete Data Guide
Comprehensive reference for all essence terms, rarity system, enhancement rates, acquisition methods, and system data in Arknights: Endfield.
Essence Terms
Every essence has up to 3 terms (stats/effects). Terms belong to 3 categories: Primary Attributes, Secondary Attributes, and Skills.
Primary Attributes (5)
Secondary Attributes (12)
Rarity System
Essences come in 5 rarity levels. Higher rarity = more term slots and higher max levels.
Enhancement
Enhance essences using Coolant Gel. Success rates vary based on how many terms the essence already has.
0 or 1 Existing Terms — 5 Tiers
| Tier | Dust Cost | Success Rate | New Term Level |
|---|---|---|---|
| 1 | 30 | 60.0% | Lv.2 |
| 2 | 60 | 24.0% | Lv.3 |
| 3 | 120 | 10.9% | Lv.4 |
| 4 | 250 | 5.0% | Lv.5 |
| 5 | 450 | 2.7% | Lv.6 |
Acquisition
Essences can be obtained through multiple methods. Total unique items: 74.
Monster Drops
Defeat enemies in the open world (30 items)
Valley IV Types: Turbid, Stable, Clean
Wuling Region Types: Turbid, Stable, Clean
Severe Energy Alluvium
Spend Sanity to challenge dungeons for Flawless essences
Episode Rewards
Complete Episode missions (9 items total)
Shops & Events
Limited sources for high-rarity essences
- • Event shops (limited availability)
- • Special campaign rewards
- • Login bonuses (occasionally)
Click on Severe Energy Alluvium or Episode Rewards cards above to jump to detailed guides
Severe Energy Alluvium
Spend Sanity to challenge dungeons. Each location has multiple difficulty levels.
In-Game Tip: Finding Compatible Essences
Open Operation Manual → Index → Energy Alluvium → Click the essence symbol (left of View button) to see which weapons can drop compatible essences at each location.
Valley IV
Tundra Region Dungeons
Enemies
Axe Armorbeast 
Tunneling Nidwyrm 
Acid Originium Slug·α 
Acid Originium Slug 
Brutal Pincerbeast 
Indigenous Pincerbeast Essence Pool (8 types)
Enemies
Bonekrusher Arsonist 
Bonekrusher Pyromancer 
Hazefyre Claw 
Hazefyre Tuskbeast 
Elite Ripptusk 
Bonekrusher Ambusher 
Bonekrusher Raider 
Bonekrusher Ripptusk Essence Pool (8 types)
Enemies
Heavy Sting α 
Heavy Ram α 
Falsewings α 
Sting α 
Ram α 
Falsewings 
Sting 
Ram Essence Pool (8 types)
Enemies
Bonekrusher Ballista 
Bonekrusher Executioner 
Bonekrusher Vanguard 
Bonekrusher Infiltrator 
Elite Ambusher 
Elite Raider Hazefyre Tuskbeast Bonekrusher Ripptusk Essence Pool (8 types)
Wuling Region
Eastern Region Dungeons
Enemies
Tidewalker 
Prism 
Hedron δ 
Hedron 
Mudflow δ 
Mudflow Essence Pool (8 types)
Episode Rewards
Complete Episode missions in each region to earn guaranteed Pure (4★) and Flawless (5★) essences.
Valley IV
4 Episodes
Wuling
1 Episode
Note: Each episode rewards one Pure Essence (Rarity 4) and one Flawless Essence (Rarity 5).
Weapon Skills Reference
Quick reference for all 5★ and 6★ weapons and their essence skill requirements. Use this table to identify which essences to keep during farming and which to use as Etching material.
Essence Farming Tips:
- When you find a matching essence, lock it immediately
- Insert essences into weapons even if not using them currently
- Use the Status column in your tracker to mark completed perfect essences
- Some 5★ weapons perform as well as or better than 6★ alternatives
Etching Strategy:
- Keep essences that match weapons you're building toward
- Use mismatched essences as Etching material
- Consider keeping flexible Universal skill essences
- 5★ weapons are easier to max potentials and can be equally viable
Preset Essences
Pre-made essences from Severe Energy Alluvium dungeons. Each has a specific skill type focus.