Abyss Guide
The Abyss is the primary PvE content in Arcana Historia. Pushing deeper unlocks better equipment, new systems, and more powerful rewards.
Abyss Overview
- 500+ depth levels across 8 regions
- Each region has a boss gate that must be defeated to proceed
- Equipment drop level scales with your current depth
- Teleport terminals placed every few layers for quick travel
- Resource concentration varies by depth
Regions & Bosses
| # | Region (CN) | English Name | Boss | Boss Gate Depth | Boss Element Weakness | Image |
|---|---|---|---|---|---|---|
| 1 | 浅层深渊 |  Shallow Abyss |
None | — | — |  |
| 2 | 低语回廊 |  Echo Corridor |
 Guttorm (古托姆) |
55 | None — balanced 55 all |  |
| 3 | 呢喃阶梯 |  Twitter LViper |
 Ifrit (伊芙利特) |
101 | Ice (30 resist) |  |
| 4 | 绝望中庭 |  Despair Stalls |
 Fafnir (法夫尼尔) |
150 | Ice (25 resist) |  |
| 5 | 极昼止境 |  Polar Day |
 Chimera (嵌合体) |
202 | Poison (10 resist) |  |
| 6 | 极夜幽径 |  Polar Night |
 Grimhild (格莉希尔德) |
252 | Poison (35 resist) |  |
| 7 | 幽邃小道 |  Secluded Trail |
 Ortiz (奥尔蒂丝) |
300 | Fire/Ice/Lightning (40 each) |  |
| 8 | 深渊核心 |  Abyssal Core |
Keeper of Fire → Evil God  Prometheus |
300 | Physical (all resist 55+) |  |
See Boss Strategy Guide for per-boss builds, gem swaps, and detailed mechanics.
Region Features
| Region | Building Cap | Special Features |
|---|---|---|
| 1–4 | 15 buildings | Standard progression |
| 5 | 15 buildings | Multi-element boss |
| 6 | 18→20 buildings | Building cap increases |
| 7 | 20 buildings | Peak Level system unlocks (hero/pet level 100 cap), Artifact star 5, Artifact level 50 |
| 8 | 20 buildings | Dust Tough system, Final boss |
Abyssal Core (Fireship) Stages
After defeating Ortiz at depth 300, you enter the Fireship multi-stage sequence:
Fireship Entrance → Fireship Interior → Ship Corridor → Fireship Core → Origin Fire → Throne of Ashes
Equipment Drop Scaling
Equipment level is hardcoded to Abyss depth:
| Depth | Equipment Slots Dropping | Significance |
|---|---|---|
| 0 | Slot 1 only | Starting gear |
| 6 | Slots 1–2 | Second equipment piece |
| 12 | Slots 1–3 | Third slot opens |
| 18 | Slots 1–4 | Fourth slot — big power spike |
| 27 | Slots 1–5 | Fifth slot |
| 36 | Slots 1–6 (all) | Full equipment set |
This is why farming low levels doesn't help — if you're at depth 20, you can only get Level 1–3 equipment. You need to push higher to get better drops.
Gem Unlock Depths
| Gem Level | Min Abyss Depth |
|---|---|
| Lv1 | 25 |
| Lv2 | 50 |
| Lv3 | 75 |
| Lv4 | 100 |
| Lv5 | 125 |
| Lv6 | 150 |
| Lv7 | 175 |
| Lv8 | 200 |
| Lv9 | 225 |
| Lv10 | 250 |
| Lv11 | 275 |
Teleport Terminals
There are 115 teleport terminals spread across all depth levels. Terminals allow quick-travel, resume farming at a specific depth, and skip cleared floors.
Terminal Density by Depth (from abyss_info.csv)
Terminals are placed roughly every 3-4 depths. Resource concentration (drop rates) increase with depth:
| Terminal | Depth | Resource Concentration |
|---|---|---|
| Terminal 00 | 1 | 0% base |
| Terminal 05 | 15 | ~23% |
| Terminal 10 | 30 | ~30% |
| Terminal 15 | 45 | ~34% |
| Terminal 20 | 60 | ~37% |
| Terminal 30 | 90 | ~41% |
| Terminal 40 | 120 | ~44% |
| Terminal 50 | 150 | ~46% |
Inert Crystal Tier by Depth
| Crystal Tier | English | Drop Depth Range |
|---|---|---|
| 碎屑 | Dust | Depth 3–80 |
| 碎片 | Fragment | Depth 29–118 |
| 完整 | Complete | Depth 77–197 |
| 优质 | Quality | Depth 149+ |
Floor Types
Each depth can contain different floor types with varying resource concentrations:
| Floor Type | Chinese | Description |
|---|---|---|
| Mine | 矿洞 | Standard combat floors |
| Plain | 平原 | Open area floors |
| Lava | 熔岩 | Fire-themed floors |
| Dungeon | 地牢 | Enclosed dungeon floors |
| Ruins | 废都 | Unlocks at depth 40+ |
| Factory | 工厂 | Unlocks at depth 40+ |
| Coastal | 沿海 | Unlocks at depth 254+ ( Secluded Trail onwards) |
Void Secret Realm (虚空秘境)
Special challenge stages that appear before each boss gate. The number of rounds increases with each region:
| Before Boss | Rounds |
|---|---|
| Guttorm |
10 rounds |
| Ifrit |
14 rounds |
| Fafnir |
16 rounds |
| Chimera |
18 rounds |
| Grimhild |
20 rounds |
| Ortiz |
22 rounds + 29-round ultimate trial |
Completing the Void Secret Realm is required to access the Domain Boss gate.
Stuck in the Abyss? Here's What to Do
If you can't progress further, farming the same depth will NOT help much. Instead, invest in systems that don't depend on Abyss depth:
Power Sources Independent of Abyss Depth
| System | How it Helps | Investment Type |
|---|---|---|
| Monster Cards | Star-up & level existing cards | Trade Permits, Literature Fragments |
| Pet Passives | Team-wide buff upgrades | Gold + pet materials |
| Pet Quality | Active pet stat multiplier | Rare points (pet fluid) |
| Gems | Combine existing gems → higher levels | Gold (buy from shop) |
| Affixes | Reroll for better quality on current gear | Gold + reroll materials |
| Skill Tree | Ensure optimal skill choices | Stones of Forgetting (if respec needed) |
| Team Composition | Try different hero paths or cards | — |
Typical Plateaus and Solutions
| Depth | Common Issue | Solution |
|---|---|---|
| 20–30 | Low damage | Get ★2+ cards on DPS |
| 50–70 | Heroes dying | Upgrade Warrior to Taunt path; get healer |
| 80–100 | Boss too tough | Max current cards; pet passives level 2+ |
| 120–150 | Damage falloff | ★4 cards; pet passives level 3; gems level 5+ |
| 180+ | Stat wall | Everything must be optimized: orange affixes, maxed cards, pet quality B+ |
Abyss Farming Tips
- Always push first, farm second — Higher depth = better drops
- Use teleport terminals — Jump to optimal farming floors
- Resource concentration varies — Some floors have higher gold/material density
- Boss fights are checkpoints — Once beaten, you can skip them on future runs
- Party composition matters for bosses — Some bosses are resistant to specific elements