Eternal Palace Sakura Area 1 Boss: Beastfang Maru

The Floor 5 boss at the end of Area 1: Sakura Pavilion (桜の楼閣) is the first major boss many players meet after climbing five floors of branching rooms. As of 2026-11-06, public sources still leave gaps, so this page separates on-screen facts, media reports, and gaps we have not closed.

Where does the Area 1 boss fight happen?

Map UI in official footage places the run in Area 1 on Floor 5 inside the Sakura Pavilion theme. That matches walkthrough reporting that the first dungeon spans five floors before a boss gate. The boss stat card above lists the same location string; we do not have a separate in-menu codex name beyond the HUD boss bar.

For how floors and room picks work before you reach this fight, see the beginner guide. Depth scaling that can make later rooms—and potentially this boss—tougher is covered under Mugen Depth.

What is the boss called in English and Japanese?

On official English combat footage, the boss health bar label reads Beastfang Maru. On official Japanese trailer footage, the bar label reads 牙獣丸. A Game*Spark preview article names 牙獣丸 as the boss of Sakura Pavilion and describes the encounter in Japanese coverage.

No single source we found prints Beastfang Maru and 牙獣丸 together as an official bilingual pair. Because both labels appear on first-party HUD footage for the same Area 1 Floor 5 role, and because Game*Spark ties 牙獣丸 to this pavilion, we refer to the boss as Beastfang Maru (牙獣丸) and call that a strong inference, not a confirmed glossary entry.

One English review’s body text calls the first-area boss a fast “ninja commander”, while an image caption on the same page names Beastfang Maru. We do not know whether the prose nickname, the caption, and the Japanese reporting all describe one character or a conflation of early bosses; treat the ninja-commander wording as single-source prose, unconfirmed, until more English UI or patch notes align it.

Official Steam store combat video frame. Boss bar reads Beastfang Maru; HP and combo numbers are from one moment, not fixed constants.

Same official clip, earlier frame. AP and hit counts are examples from that recording.

Official announcement trailer frame with Japanese UI. The boss bar shows 牙獣丸; AP shown is from that frame only.

What do sources report about the fight?

Game*Spark’s preview states that adds appear before the boss, that the enemy has large wings, and that attacks include fire breath and wide sweeping strikes. The author lost the first attempt and won on a second after strengthening their setup (media report). Their build details are anecdotal, but the add phase and attack shapes are useful context.

We are not listing named phases, telegraphed skill titles, elemental weaknesses, or a verified HP total. The stat card at the top therefore says Not verified for everything except location. HP appears only as a single-frame example from official video (about 15,559 / 26,652 mid-fight in one English clip).

After the fight, one English review says the first-area boss can reward SS-rank Attributes. We have not verified drop tables, guaranteed ranks, or whether every clear produces loot. Mention it only as a single reviewer claim until spoils screens or achievements confirm it.

What might help, based on verified combat rules only?

The bullets below are mechanism-based suggestions, not a tested Beastfang Maru strategy. We did not independently play this boss for this page.

Sources agree that Perfect Dodge and Perfect Block restore AP, which feeds your four equipped Arts (combat basics). If the boss and adds pressure you during long animations, timing those defenses may matter more than raw button mashing—this is inference from system rules, not boss-specific lab work.

GameWith’s walkthrough notes that once shield durability breaks in a run, it does not recover. A fight with adds plus wide sweeps and breath attacks is a plausible place to burn block value early; again, that is logic from shield rules, not confirmed footage of this encounter.

Mugen Depth raises enemy scaling as you take map actions and rewards (Mugen Depth guide). Reaching Floor 5 after heavy depth gain may inflate enemy HP and damage compared with a low-depth route. Whether that applies equally to this boss’s bar values is not verified; depth is a general run modifier, not a published boss modifier table.

If you are still assembling Arts for the climb, the Arts list tracks names we can source today—not a full roster—and combat basics explains AP, Tension, and Over Arts without pretending we solved this boss.

Sources and verification

• Official English combat video (Steam store embedded “MASTER THE COMBAT” footage): boss bar Beastfang Maru; example HP and combo numbers.
• Official announcement trailer (Announcement0930_EN on Steam): Japanese boss bar 牙獣丸; example AP on HUD.
• Game*Spark preview (gamespark.jp article 174287): 牙獣丸 as Sakura Pavilion boss; adds; wings; fire breath; wide sweeps.
• NoobFeed review (noobfeed.com): “ninja commander” prose vs Beastfang Maru image caption; SS Attribute drop claim (single source).
• Official Steam screenshot set (Area 1 map UI): Area 1 / Floor 5 context.

Still not verified on this page: elemental weakness or resistance, phase count, official skill names, fixed HP, official drop table, and whether the ninja-commander prose matches Beastfang Maru beyond the caption conflict.