Boss: Fafnir (法夫尼尔)
Region 4 — Courtyard of Despair (绝望中庭) | Depth 150
Overview
| Stat | Value |
|---|---|
| Region | 4 — Courtyard of Despair |
| Gate Depth | 150 |
| HP Ratio | 22 |
| ATK Ratio | 1.1 |
| DEF Ratio | 2.0 (very high) |
| Speed | 2 (slow) |
| Attack Speed | 240 frames (4.0s — slowest boss) |
| Toughness | 20 |
| Knockback | Immune |
| Enrage | 120s — stacks every 20s |
Fafnir has the highest DEF ratio (2.0) and slowest attack speed (4s) of all bosses. He hits like a truck but attacks rarely. The fight is about surviving massive burst hits.
Normalized against game maximums
Element Resistances
| Fire | Ice | Lightning | Poison | Best Element |
|---|---|---|---|---|
| 30 | 25 | 35 | 35 | Ice |
Fafnir has the lowest ice resist of any boss at 25. Fire is also viable at 30.
Skills & Attack Patterns
| Skill | Type | Damage | Range | Cooldown | Effect |
|---|---|---|---|---|---|
| Melee Cleave | Basic Attack | 65% ATK | AoE r=2 | 4.0s | Guaranteed hit (must_hit), knockback |
| Whirlwind Slash | Active | Spinning multi-hit | Self | 40s | 12–15s charge-up, then 6s of invulnerable spinning (+100 debuff resist, +150 DMG resist, +100 speed) |
| Dragon Breath | Active | 150% ATK | 6 tiles (cone) | 15–25s | Fan-shaped AoE (10–100 degree cone), heavy knockback. If 50+ damage instances land, triggers a follow-up attack. |
| Lightning Orbs | Active | Summon | AoE r=5 | 25–30s | Summons up to 4 electric orbs (ID 3100043) that persist and deal AoE lightning |
| Observer Summon | Phase (0–30% HP) | — | — | One-time | Begins periodically summoning observer puppets |
| Death Whirlwind | Phase (0–20% HP) | Spinning | Self | One-time | Enters permanent spinning state for 90 seconds. Invulnerable spin with +100 debuff resist, +150 DMG resist. |
Passive Abilities
| Passive | Trigger | Effect |
|---|---|---|
| Random Stun | On basic attack hit | Triggers a secondary skill with stun chance |
| Crit Retaliation | When critically hit | Gains +5 battle speed, +1 ATK speed per crit taken (stacks 100, 60s). The more you crit Fafnir, the faster he attacks. |
Critical Discovery: Fafnir has Crit Retaliation — every crit you land on him makes him attack faster (stacks up to 100 times). Crit-heavy builds like Volley Archer actually make this fight harder. Consider non-crit builds.
Phase Transitions
| HP Threshold | Event |
|---|---|
| 100–31% | Normal combat — all skills available |
| 30% | Begins summoning Observer puppets periodically |
| 20% | Death Whirlwind — permanent 90s invulnerable spinning. Cannot be stunned, debuffed, or interrupted. Deals continuous AoE damage while spinning. This is the hard DPS check. |
The 20% Death Whirlwind is the fight-ender. You need enough DPS to burn through 20% HP before the spinning damage kills your team, or enough survivability to outlast 90 seconds of it.
Adds & Summons
| Summon | Stats | Behavior |
|---|---|---|
| Lightning Orbs (3100043) | Low HP, stationary | Persist on the field dealing AoE lightning. Max 4. Kill them or the AoE stacks up. |
| Observer Puppets | Moderate HP | Spawned at 30% HP. Deal damage and distract your DPS. |
| Standard Adds (1000041) | HP +25%, DEF +100%, ATK +70% | Periodically summoned |
Optimal Team Comp
Fafnir's tail swipe hits in a line — Taunt keeps it aimed at you. Rock Dragon's ★3 damage rebound punishes Fafnir's rapid multi-hit attacks.
Rock Dragon
Chrysalis
Ruby/Ruby/RubyRuby/
Garnet/Garnet
Sapphire/Sapphire/
EmeraldSapphire/Sapphire/Emerald
Fafnir's poison pools require constant healing. AoE heal cleanses DoT stacks. Boar King's double-cast is critical during enrage phase.
Octopus King
Boar KingRuby/Ruby/RubyRuby/Ruby/
TopazEmerald/Emerald/SapphireEmerald/Emerald/Sapphire
Fafnir is weak to Lightning. Whirlwind's 4★B2 lightning conversion + Ziggs' +120% Lightning Amp melts through Fafnir's HP pool. Lilith set compounds the damage.
Summer Ziggs
Golden Demon
Citrine/Citrine/RubyCitrine/Ruby/GarnetSapphire/Sapphire/EmeraldSapphire/Emerald/EmeraldAlternative DPS
Poison DoT ignores Fafnir's physical armor
Rex Savage stacking shreds single-target bosses
Gem Adjustments
| Slot | Swap From | Swap To | Why |
|---|---|---|---|
| Tank Armor S3 |  Emerald (HP) |
Sapphire (DEF) | DEF directly mitigates Fafnir's physical burst |
| Tank Amulet S2 | Emerald (HP) |
Sapphire (DEF) | Stack DEF for Melee Cleave and  Dragon Breath |
Strategy Summary
- Stack DEF on your tank — Fafnir does massive physical damage. Sapphire gems save lives.
- Avoid over-critting — Crit Retaliation makes him attack faster. Poison/element builds sidestep this entirely.
- Kill Lightning Orbs immediately — 4 orbs dealing AoE lightning simultaneously will overwhelm your healer.
- Burn through 20% fast — Death Whirlwind at 20% HP is a 90-second invulnerable spinning DPS check. Save cooldowns for this phase.
- Dodge Dragon Breath cone — Ranged DPS should stay to the sides, not directly in front. Only the tank should face Fafnir.
Drops
| Drop | Rate |
|---|---|
| Unique Naraka Drop | 70% |
| Red Equipment (Area 3 tier) | 85% |
| Gold + Resources | Guaranteed |
| Equipment Recipes | Included |
| Artifact Stones | Included |
| Stage Mutate Scrolls (x5) | Guaranteed |
Naraka boss drops use fixed loot tables — Magic Find has no effect.