Beat King / Sonic Tyrant Complete Guide: Blow Up the Crowd Arc, Rhythm-Battle Mechanic & Psyche Element Strategy

Quick answer: the Beat King / Sonic Tyrant / Rhythm Master Anomaly commission sits in the Fiscus Boulevard plaza in Mirage Town, weakness Psyche. The core is a rhythm-timing battle (🟡 jump 🔵 dodge 🔴 basic attack, fixed memorizable chart) + a parry-able Transforming Disc at 50% HP that knocks the boss down. The first clear guarantees the S-rank Blow Up the Crowd Arc (Haniel’s signature weapon — obtained by containing the Anomaly Residue, not a random drop). ⚠️ Haniel herself is the 30-million pre-registration mail reward, NOT a drop from this boss.

ℹ Naming note: this site usually writes “Hania”; the official English is Haniel, and in-game Traditional Chinese mostly uses “哈尼婭”. The boss name “Rhythm Master” matches the commission name; “Sonic Tyrant” is a descriptive nickname — defer to the in-game official localization.

NTE has only a handful of Anomalies that bake an actual rhythm game straight into a boss fight — Beat King is one of them, with a score-chart bar beneath the HP bar that deals massive damage when you hit the beat. This article rounds up the rhythm mechanic, the moveset, the parry, and the Psyche teams all in one place.

1. What Is Beat King

Item	Details
English boss name	Beat King
English commission name	Rhythm Master
Chinese name	”節奏王” / “音速暴君” (defer to the in-game official localization)
Anomaly class	Class IV, Common Commission, object-type
Theme	A music / rhythm Anomaly — it attacks with a keyboard, a disc (turntable), and amp soundwaves, layering a rhythm-timing challenge mechanic over the entire fight

2. Location / Unlock / Trigger

Location

• Mirage Town (Illusion Town), the open plaza / park at the end of Fiscus Boulevard, at the road fork
• Walk to the center of the plaza and approach Beat King to trigger the fight
• After your first clear, the spot unlocks fast travel

The “office-building arena” claim you may have heard isn’t backed by the major guide sites; the mainstream placement is the Fiscus Boulevard plaza / park — defer to in-game.

Unlock conditions

• All Anomaly commissions unlock after you clear the main-story “Prologue Part 2”
• Open the world map → “Anomaly Commission” menu in the bottom-right → pick “Rhythm Master / Beat King” → head to the plaza to fight
• The commission itself is the first-clear flow; completing it unlocks the high-difficulty variants

3. Element & Weakness

Item	Details
Weakness	Psyche — use Psyche-element damage to efficiently drain the boss’s stagger / Break gauge
Resistance	No specific resistance listed; no known element immunity

Bottom line: a Psyche-element DPS Main DPS staggers faster, so leaning on Psyche damage + stagger efficiency is best.

4. Moveset + Rhythm Mechanic [Article Highlight]

A. Core mechanic — the rhythm-timing battle ⭐

During the fight, when the “score chart / scoring bar” below the boss’s HP bar starts scrolling, you enter a rhythm section. Colored Notes pop up on screen, and you have to hit the matching input on the precise beat:

Icon color	Input
🟡 Yellow	Jump
🔵 Blue	Dodge
🔴 Red	Basic Attack

• Hit the beat: negates that segment’s damage AND deals “extremely high” damage to the boss — the single biggest damage source in the fight
• Two rhythm patterns: an opening pattern + a second-and-onward pattern (different Note arrangements)
• ⭐ Key intel: the rhythm chart is “not random” — it’s fixed every run. Do 1-2 runs to memorize the order, ready your fingers before the icons appear, and your timing accuracy improves dramatically

B. Standard moves (above 50% HP)

Move	Traits
Pounce + two-hand disc slam	2-hit combo, fast startup
Continuous disc slams	Clear wind-up, easy to react to
Keyboard smash + spin	Clear wind-up animation
Keyboard sweep + disc slam	3-hit combo, very short wind-up, wide range (harder to dodge)
Keyboard swing + amp soundwave	Ranged soundwave
Triple soundwave + charged shockwave	AoE

C. New moves below 50% HP + Parry ⭐

Move	Counterplay
🟢 Transforming Disc Rush	Parry-able! Big wind-up during the transformation — prepare your parry the moment you see the transform animation; a successful parry knocks the boss down → creates a damage window
Continuous electric shocks + cross- / X-shaped soundwaves	Dodge only, cannot be parried

5. Rewards

First-clear reward (Rhythm Master commission completion)

• 🏆 S-rank Arc “Blow Up the Crowd” — a Solid Arc, Haniel’s signature weapon
• Hunter EXP × 300, Crystals × 40, Funds × 15,000, Silver Vine × 80, U-00NE × 30, Beetle Coins × 7,500, Anomaly Material Selection Box I × 5

How to obtain: after defeating Beat King, contain the “Anomaly Residue” to get it — it’s the commission’s guaranteed first-clear reward, not a random battle drop.

⚠️ Important clarification

• Haniel herself ≠ a drop from this boss! Haniel is the A-rank Psyche-element support from the 30-million global pre-registration milestone reward, claimed from your in-game mail (collectible from your mailbox on first login, no redemption code needed)
• This boss / commission only gives her signature weapon, the “Blow Up the Crowd” Arc

Blow Up the Crowd Arc effects

• Backline layer: while on the backline, the on-field character gains +10% ATK; each time Haniel deals damage that buff gains +2% (up to 4 stacks = +8%)
• Frontline layer: while on-field, +12% Psyche DMG; each basic attack that deals Psyche damage adds another +2% / stack (up to 10 stacks)
• One of the strongest free S-rank Arcs at launch. See the Haniel Complete Build Guide for details.

6. Recommended Teams (Psyche weakness)

TW T0 team ⭐

Nanally (Anima burst Main DPS) + Jiuyuan (Anima backline / mob-gathering) + Sakiri (Incantation Buffer) + Haniel (Psyche support)

Common combo: Sakiri gathers mobs and redirects them → Esper Zero tops up the resonance gauge → Jiuyuan triggers the Genesis Flower → Nanally bursts. Jiuyuan keeps dealing damage even while you’re locked into the rhythm minigame, which makes her extremely valuable in this fight.

Discord team (EN-site reference)

Daffodill (Main DPS) + Aurelia + Sakiri + Fadia

Team-building principles

1. High-burst Main DPS that staggers fast (a Psyche-element DPS counters the weakness even better, for the best stagger efficiency)
2. Bring characters with fast basic-attack / parry-counter animations (the boss attacks at short intervals)
3. ⭐ Most important — bring a backline character that keeps dealing damage even while you’re locked into the rhythm minigame (e.g. Jiuyuan)

The TW T0 team above excels at general-purpose burst and backline sustain, making it a strong all-round pick; if your roster is deep enough, slotting in an extra Psyche-element DPS (which counters this boss’s weakness) staggers even faster.

7. Rhythm-Battle Tips + Common Beginner Mistakes

Beat-following tips

1. Memorize the chart: the chart is fixed, not random — do 1-2 runs first to memorize the “blue (dodge) / yellow (jump) / red (basic attack)” order, and ready your fingers before the icons appear
2. Tell the two patterns apart: the opening pattern and the second-and-onward pattern are arranged differently — don’t force the same muscle memory onto both
3. Hitting right = double payoff: a correct beat negates the damage AND deals huge damage at once, so prefer playing it safe and accurate over button-mashing

Parry the disc below 50% HP

4. Catch the parry off the “transform animation”: a transforming disc = the tell for the rush, with a big, easy-to-read wind-up; parrying the rush can knock the boss down
5. Cross- / X-soundwaves are dodge-only: don’t try to parry the electric shocks or soundwaves

Common beginner mistakes

❌ Mistake	✅ Correct play
Only reacting to the red warning flash	Watch the boss’s move wind-up and prepare to dodge
Thinking Haniel drops from this boss	Haniel is the 30-million pre-registration mail reward; this only drops her signature weapon
Mashing during the rhythm section / hitting the wrong jump-dodge-attack color	Memorize the chart first, or you lose huge damage and take hits
The whole team idling while you’re locked in	Bring a backline sustain character (e.g. Jiuyuan)
Brute-forcing it without Psyche damage	Slow stagger, drawn-out fight — bring a Psyche-element DPS to stagger

8. High-Difficulty Variants (High-Risk)

• Unlock after completing the standard commission, with 6 difficulty tiers (roughly level 43-88)
• Tiers 5-6 add mechanics: Overload, Flash Moment, Hunter’s Gaze, Perfect Rhythm (higher tiers lean even harder on hitting “Perfect” in the rhythm game)
• Exact values defer to in-game

9. Related Guides

• Complete Anomaly Boss Bestiary — overview of all 18 bosses
• Serenetti / Mammon / Headless Rider — other popular bosses
• Haniel Complete Build Guide — owner of Blow Up the Crowd
• Signature Weapons (Signature Arcs) Complete Guide — full Blow Up the Crowd comparison
• Elemental Reaction System — Genesis / Overprint reactions

FAQ

Beat King data compiled from GameWith, Game8, GameTrek, Icy Veins, GamingProMax, ZeroLuck, AllThings.How, the official NTE sources, 4Gamers, LDPlayer, Bahamut, Nerdschalk and other public sources. Official Traditional-Chinese move names, weekly respawn rewards, and per-tier high-difficulty values are pending — defer to in-game.