Black Tome / Book of Post-Adolescence Complete Guide: Youthful Fantasy Arc, Chaos Weakness, Chain Bind & Parry

Quick answer: Black Tome / Book of Post-Adolescence is on the 4th floor of the New Harland District construction site (climb the fence on the east side, take the elevator up), weak to Chaos at about 16%. Two-phase fight: Phase 1’s line laser with its 2.5-second bind is the deadliest; Phase 2 adds chains + falling doors + rotating laser; the red-ring swing moves can be parried for a stun. Your first clear guarantees the Youthful Fantasy S-rank Arc (Daffodill’s signature weapon). Best-in-slot Discord team: Daffodill + Sakiri + Fadia + Baicang.

ℹ Naming note: in-game Traditional Chinese is “黑色魔典” (Simplified Chinese “黑之書”), with the commission named “Book of Post-Adolescence”. Note: the boss’s Chaos weakness ≠ Daffodill’s name — don’t confuse the commission type (Icy-Veins labels it Bio) with the Arc type (confirmed Liquid).

The Black Tome is a spellbook Anomaly sealed by two chains. It drops the free signature weapon “Youthful Fantasy” for Daffodill, 1.0’s only Chaos Main DPS, and the boss’s own mechanics echo the weapon. This guide covers the location, moveset, chain binds, parrying, and the Discord team all in one place.

1. What Is Black Tome

Item	Details
Anomaly Boss name	Black Tome (Simplified Chinese “黑之書”)
Anomaly commission name	Book of Post-Adolescence (The Book of Post-Adolescence)
Anomaly Class / type	Anomaly Class III; normal commission
Signature weapon drop	Youthful Fantasy — S-rank Liquid Arc, Daffodill’s signature weapon

Background: an Anomaly shaped like a spellbook (a tome). Its most iconic detail is that it is “sealed by two chains” — a concept built directly into the signature weapon Youthful Fantasy’s passive (the boss and weapon mechanics echo each other), with a theme centered on “youth / fantasy”.

2. Location and Unlock

Location (the two descriptions are the same spot)

• New Harland District, beside the Kyllene Walkway / Kyllene Pedestrian Street, on the top (4th) floor of an office building under construction
• Just head southwest from Wertheimer Tower to get there (“southwest of Wertheimer Tower” and “the Kyllene Walkway” are the same building)
• Entry route: walk to the east side of the building and climb over the fence → take the elevator straight up to the 4th floor → interact with the glowing “Black Tome” on the rooftop to start the fight

Unlock Requirements

• Advance the main story until you unlock the New Harland District (opening that area’s map and fast travel)
• Hunter Level around 30
• Accept the “Book of Post-Adolescence” normal commission
• ⚠️ The exact thresholds vary slightly between sources (English sites claim there is no main-story requirement) — go by the in-game values

3. Element and Weakness

• Weakness element: Chaos — Daffodill’s signature element; official sources and every guide agree she is the recommended Main DPS
• Resistance: Chaos resistance is about 16% (lowest of the six elements) → Chaos is the most efficient against it and easiest for triggering Break (single-source data, go by the in-game values)

4. Moveset (Two Phases)

When HP drops to roughly 50%, the fight enters Phase 2, adding chain and falling-door mechanics.

Phase 1 (mostly ranged)

Move	Type	Counter
⚠️ Line Laser	Ranged	The deadliest. About a 1.2-second wind-up (body sinks + condensing black light); on hit it forces a bind of about 2.5 seconds. On the charge, dodge sideways / circle behind or jump/crouch out of it
Multi-hit Laser	Ranged	Multi-hit damage, longer wind-up
Spiral Barrage	Ranged	Fast animation, fast hit detection
Double Sweep	Melee	Chain-shaped, two consecutive hits
Double Front Kick	Melee	Can be blocked! A red ring appears = the block window
Lunge Triple	Melee	Teleports behind the player; the lunge segment is hard to dodge
Overhead Attack	Ranged	Fires crystals; staying close actually lets you avoid the damage

Phase 2 (HP < 50%, new moves)

Move	Mechanic	Counter
Chain Bind	Random purple warning circles on the ground; chains burst out and bind on hit	Can only be dodged: run along the outer ring, don’t stand in one spot
Falling Door	A giant “door” slams down on the player’s current position; binds on hit	Watch the warning and dodge immediately, keep moving
Rotating Laser	A 180° fan rotating around the center, lasting about 3-4 seconds	Alternate jump/crouch to evade, and never stand in the center
Melee Rush	Attack speed increases after landing	Dodge on the red flash, catch the recovery, land one combo and back off

Can Block vs Can Only Dodge (key)

• ✅ Can be parried (timed block → stun): the special melee swing moves with a shrinking red ring (double front kick, lunge swing segments) → when the red ring shrinks, land a normal attack / skill to trigger “block counter”, which blocks the attack and stuns the boss + deals extra stagger
• ❌ Can only be dodged: the line laser and other ranged lasers, plus Phase 2’s chain and falling-door binds (tanking them gets you bound)
• Regular attacks are flagged by a red warning and can trigger a counter via Critical Dodge

5. Drop Rewards

First Clear (completing the commission)

• 🏆 Youthful Fantasy — an S-rank Liquid Arc, Daffodill’s signature weapon (guaranteed one on your first clear)
• Coal Lump’s Gift, containing A Page from Delusion’s Shore (upgrade material)
• Hunter EXP 300, Crystals 40, Funds 15,000, Silver Vine 80, U-00NE 30, Beetle Coins 7,500, Anomaly Material Selection Box I × 5

Youthful Fantasy Arc Stats

• Max level: base ATK 570, sub-stat ATK +30%, Stagger Power +60 (refinement raises this to 60-88)
• Passive “Black Tome”: it starts sealed by two chains; the team unlocks one chain each time it casts an Assist skill, and once both chains are undone it activates for 20 seconds — every 5 seconds it marks one enemy, granting +20% Chaos damage, and when that enemy takes Break damage it suffers additional Chaos damage equal to 200% of the holder’s ATK

For full Arc info, see the Daffodill Complete Build Guide.

Weekly Reruns + High Danger

After your first clear, the High Danger version unlocks with 6 difficulty tiers (about Lv45-90), adding mechanics like Overload, Flash Moment, and Perfect Rhythm; you can rerun it weekly for upgrade materials (details per the in-game values).

6. Recommended Teams (Chaos Weakness)

Core: Daffodill as Main DPS + triggering the Discord loop (the strongest stagger in the Chaos kit), while using Assist skills to break the weapon’s chains.

Discord Team ⭐

Daffodill (Chaos Main DPS) + Sakiri (support / mob-gathering) + Fadia (Buffer / damage reduction) + Baicang / Haniel

Discord mechanic: pair Daffodill with characters that can trigger Scorch + Nova; apply both to the same target at once → trigger Discord, for extremely fast stagger

Common Variants

• When you need more survivability, use Fadia in place of Haniel (damage transfer for extra leeway)
• When you need mob-gathering / healing, slot in Jiuyuan

⭐ Bring at least 1-2 Buffer/support characters (Sakiri, Esper Zero): the goal is to break the weapon’s two chains + quickly maintain the Discord loop. Once Lacrimosa arrives in 1.1, she can also take over as the Chaos Main DPS (see the Lacrimosa Preview).

7. Combat Tips + Common Beginner Mistakes

Breaking the “Chain Bind”

• In Phase 2, purple circles on the ground = chain warnings; this is a pure dodge move, do not try to block it. Run along the outer ring of the arena and jump/crouch out; during the rotating laser especially, don’t stand in the center
• Line laser has a 1.2-second wind-up and a 2.5-second bind → circling behind sideways is the safest (it forces the boss to re-aim for about 1.8 seconds, opening a damage window)

Red-Ring Parry Stun (your burst window)

• When you see a shrinking red ring, land a normal attack / skill the instant it shrinks → trigger the block counter → boss is stunned + extra stagger
• The stun is the best time to pour out Chaos damage and push toward Break

Common Beginner Mistakes

❌ Mistake	Consequence
Trying to tank the laser or chains	Unblockable; tanking them = bound for 2.5 seconds of free hits
Standing in the arena center in Phase 2	The 180° rotating laser sweeps you for full damage
Forgetting to use Assist skills	The signature weapon’s two chains never come undone, costing you a huge chunk of Chaos burst
Chasing the lunge triple on the spot	The boss flickers behind you; you must turn around and watch for the red flash to dodge
Only trying to run from kicks / swings	They can actually be blocked; a timed parry trades for a stun, so don’t waste the damage window

8. Related Guides

• Anomaly Boss Complete Bestiary — overview of all 18 bosses
• Serenetti / Mammon / Headless Rider / Beat King / Nestbound Bird — other popular bosses
• Daffodill Complete Build Guide — the owner of Youthful Fantasy
• Lacrimosa Preview Build Guide — the 1.1 Chaos Main DPS successor
• Resonance / Elemental Reaction System — Discord / Scorch / Nova reactions

FAQ

Black Tome data is compiled from public sources including Game8, GameWith, The Profaned Geek, Icy Veins, Entertainment Taxi, Gamer.com.tw (Bahamut), Sohu, and Ali213. The unlock threshold, the 16% Chaos resistance, the move frame data (laser 1.2s wind-up / 2.5s bind / 180° rotating laser), and the weekly reward details are reference values — go by the in-game values.