Co-op boss: Lord of Jigokudani

“Lord of Jigokudani” (地獄谷の主) is a huge beast boss that lives in Resource Server 2 of the living server 「えこらいふ！」 (Ecolife!) in spa77 Network. Its basalt body is cracked with glowing lava, and steam shoots out of vents on its back. It has thick tusks in its jaw. Deep inside the north arena, something else seems to be lurking.

It is hard to beat alone, so it is meant to be fought together with other players. When you defeat it, you receive Spa Medals and special items according to the share of damage you dealt.

Where it lives

In Resource Server 2, there is a round stone arena made of black stone at each of the east, west, south, and north points, with one boss in each. The center coordinates of the arenas are as follows.

Location	Center coordinates (x, z)	Level	Difficulty
East	3000, 0	Lv.5	★1 Easy
South	0, 3000	Lv.10	★2 Normal
West	-3000, 0	Lv.18	★3 Hard
North	0, -3000	Lv.30	★4 Hardest

The boss’s strength differs by arena. See How strong it is for details.

Each arena is a circle with a radius of 20 blocks and has a low wall around its edge. There are entrances at the east, west, south, and north, and campfires burn on top of eight basalt pillars. A walkway at the same height as the floor runs all the way around the outside of the wall, allowing you to return inside through an entrance even if the surrounding ground is higher.

Inside the arena and around it (within 26 blocks), you cannot break or place blocks or use buckets. However, water buckets (water only) can be used on air blocks to prevent fall damage when launched or to extinguish fire. Placed water disappears after 5 seconds and can be scooped back up before it vanishes. You cannot waterlog campfires or walls, and buckets containing lava, powder snow, fish, or axolotls cannot be used.

Inside the arena and around it (within 26 blocks), hostile monsters such as zombies, skeletons, and creepers do not spawn, day or night. Hostile monsters that walk in from outside disappear right away without dropping items or experience. The Lord of Jigokudani, the magma cubes it summons, and monsters named with a name tag do not disappear.

Every time Resource Server 2 is regenerated, the arenas are rebuilt on the new terrain.

Type /boss list in chat to see the coordinates, difficulty, status, and next respawn time of the four arenas, as well as the status of the True Lord. The status is one of “在場” (present), “討伐済み” (defeated), or “未建設” (not built).

Appearing, leaving, and respawning

The boss appears when you come within 48 blocks of the arena. If no one is within 80 blocks for 60 seconds, the boss leaves. The four regular Lords of Jigokudani fully recover their health when they leave. Only the hidden boss, the True Lord of Jigokudani, keeps its health and contribution after leaving.

Even after it leaves, that arena’s boss is still there and appears again when you come near. It does not stray far from its arena, and returns to the center if it does.

A defeated boss respawns every evening at 21:00 (Japan time). If the server was stopped at 21:00, it respawns when the server starts later that same day. When it respawns, an announcement appears in the game.

How strong it is

The four bosses have levels, and the difficulty differs by arena. As the difficulty rises, their health, attacks, and defense become stronger, and they use more skills. The east boss (Lv.5, ★1 Easy) is the easiest, and the north boss (Lv.30, ★4 Hardest) is the strongest. If you are playing alone or with a few players, start with the east arena.

The boss bar name shows the location and level, like “地獄谷の主 (North, Lv.30)”.

The more players fighting within 48 blocks, the less damage the boss takes. At every difficulty, the fight is designed for several players working together.

When its health gets low, the boss goes into a rage. Its movements become more intense, and the boss bar changes from red to purple.

Boss skills

The boss uses up to seven skills. Bosses in stronger arenas use more skills. Every skill displays a warning such as a ring or line before it hits, so you can avoid them by leaving the area.

Skill	What it does
Tremor	The boss rears up and slams the ground at its feet, dealing damage around it
Steam	With a roar, steam bursts out from under your feet, dealing damage and setting you on fire
Charge	The boss charges straight toward a targeted opponent. What happens if it hits a pillar or wall…?
Leap	The boss leaps high toward someone far away and stomps the ground where it lands
Fire Pillar	Pillars of fire erupt from under your feet and across the floor
Anti-air	If you fly with Elytra or stay in high places, the boss shoots projectiles at you. Getting hit closes your Elytra, and you cannot open them around the arena for a while
Minions	When its health gets low, the boss summons a swarm of Magma Cubes

Anti-air projectiles can also fly in while other skills are active. If you fight on the ground, the boss will not target you with Anti-air.

The reward “Core of the Lord” helps against the burning from Steam and Fire Pillars.

Damage dealt by directly hitting with a mace is up to 24 per hit.

Rewards

When you defeat the boss, rewards are decided by the share of damage you dealt (your contribution). Players with a contribution of 5% or more, and the top three players by contribution, are eligible.

Reward	Details
Spa Medals	A total that depends on the difficulty, divided by contribution. At least 5 per player
Core of the Lord (主の熔岩核)	The number depends on your rank and the difficulty (see the table below)
Tusk of the Lord (主の牙)	1 tusk, for 1st place only
Hidden advancement	Eligible players can complete this

The total Spa Medals and the number of Cores of the Lord are as follows. Higher difficulties give more.

Location and difficulty	Spa Medals (total shared)	Core of the Lord (4th or lower / 2nd-3rd / 1st)
East (★1 Easy)	60	1 / 2 / 3
South (★2 Normal)	100	1 / 2 / 3
West (★3 Hard)	150	2 / 3 / 4
North (★4 Hardest)	220	3 / 4 / 5

For Spa Medals, see Spa Medals.

Core of the Lord

A core that was burning inside the boss’s body. Right-click it (tap on Bedrock Edition) to get Fire Resistance for 10 minutes and Regeneration II for 10 seconds. It helps against the burning from Steam and Fire Pillars, so it is reassuring to use one before fighting the boss.

Tusk of the Lord

Proof of defeat for taking first place against the boss. Inscribed with the arena location and date, it is a special item that only the player who contributed the most that day can obtain.

Neither the Core of the Lord nor the Tusk of the Lord can be used as an ingredient in crafting tables, brewing stands, anvils, and so on.

Hidden advancement

When you defeat the boss and are eligible for rewards, you can complete the hidden advancement in the “えこらいふ！” advancement tab.

Rewards you could not receive

Rewards you could not receive because your inventory was full, or because you were logged out at the moment of the defeat, are kept for you.

Type /boss claim in chat to receive them. Free up space in your inventory before you run it. If you have rewards kept, a notice appears when you join the server.

Hidden boss: True Lord of Jigokudani

Beyond defeating the north Lord, something even stronger awaits.

Open to learn about the hidden boss

In the north arena, there is a Lv.50 hidden boss, the “True Lord of Jigokudani”, which can be summoned after defeating the Lord. It has the same shape as the Lord of Jigokudani, but its body is black, its cracks and eyes glow pale blue, and it is wrapped in pale blue flames. The boss bar name is “地獄谷の真主 (Lv.50)”, and its color is blue (turns purple when enraged).

How to summon

You can summon the True Lord by using one Tusk of the Lord on the floor of the north arena.

After defeating the Lord in the north arena (★4 Hardest), right-click (press and hold or tap on Bedrock Edition) while holding a “Tusk of the Lord” on the floor of the north arena to spend one tusk and summon it. You can use a tusk of any date or location. When summoned, an announcement appears in the global chat.

Even after summoning, the battle does not start right away. There is an appearance sequence that lasts about 10 seconds. First, the ground rumbles and the screen shakes. The surroundings turn dark, and pillars of blue fire rise from the 8 pillars in the arena. From the center of the floor, the True Lord crawls up from the ground along with a vortex of blue flames.

When the True Lord roars, a shockwave pushes nearby players back slightly (this deals no damage). The darkness also fades at this point. The name appears large in the center of the screen, and the battle begins. During the sequence, the True Lord does not attack. Your attacks will not work either. The boss bar appears when the battle begins.

Players who are far away from the arena will also see the message “The True Lord of Jigokudani has awakened” on their screens. They will also hear a distant roar.

It cannot be summoned, and no tusk is spent, in the following cases:

• The north Lord is still alive
• The True Lord has already been summoned
• The True Lord has already been defeated that day
• You are not standing on the floor of the arena

You can defeat the True Lord once per day. Once defeated, it cannot be summoned again until the next respawn at 21:00 (Japan time).

After being summoned, it appears when you come near and leaves when no one is around, just like the regular Lord. Even if it leaves, it remains summoned, and its health and contribution are kept. Its health does not recover while it is away, and when you come near again it appears with the fight continuing from where it left off. This progress lasts until it is defeated or returns to the depths of the valley at 21:00. If 21:00 arrives without the True Lord being defeated, it retreats to the depths of the valley and all four Lords respawn (the spent tusk is not returned). While the True Lord is summoned, the north Lord does not appear.

Type /boss list in chat to check the status of the True Lord (summoning / can summon / defeated today / can summon after defeating the north Lord).

Strength and skills

The True Lord is Lv.50, far stronger than the north Lord, and unleashes all skills fiercely.

When its health gets low, it goes into a rage and uses “Ring of Blue Flame (蒼炎の環)”, a skill exclusive to the True Lord. Rings of pale blue flame spread and close in around the True Lord. Watch the warning signs carefully to find where to escape.

Rewards and Horn of the True Lord

When you defeat the True Lord, you receive Spa Medals and special items.

The eligibility conditions are the same as the regular Lord: players with a contribution of 5% or more, or the top three players by contribution. Eligible players can complete the hidden advancement. If your inventory was full, you can claim your rewards with /boss claim.

Reward	Details
Spa Medals	400 shared by contribution (at least 5 per player)
Core of the Lord (主の熔岩核)	3 for 4th or lower / 4 for 2nd-3rd / 5 for 1st
Horn of the True Lord (真主の角)	1 horn, for 1st place only (no Tusk of the Lord drops)

The “Horn of the True Lord” is proof of defeat for taking first place against the True Lord of Jigokudani. Inscribed with the date, it is a special item that only the player who contributed the most that day can obtain. It cannot be used as a crafting material.

Announcement of a defeat

When the boss is defeated, the names and contributions of the top three players by contribution are announced in the in-game chat and on Discord.

Appearance

On Bedrock Edition, there are fewer detailed movements of the body parts, such as when the boss bites or roars, than on Java Edition.

On Java Edition, the boss appears as a custom 3D model if you have the server’s resource pack installed. Without the resource pack, the boss does not display correctly.

Troubleshooting

Situation	What to check
The boss is not there	It may have been defeated. Check its status with /boss list. It respawns every evening at 21:00 (Japan time)
The boss does not appear when you come near	Check that you are within 48 blocks of the arena and playing in Survival or Adventure mode
The True Lord does not appear when using a Tusk of the Lord	Check that the north Lord has been defeated, that the True Lord has not already been summoned or defeated today, and that you are standing on the floor of the north arena
Your damage is low	The more players fighting nearby, the less damage the boss takes (see How strong it is). Higher-difficulty bosses also have stronger armor
The mace does not deal heavy damage	Damage dealt with a mace is up to 24 per hit
The Elytra does not open	If you are hit by an Anti-air projectile, you cannot open your Elytra around the arena for a while
You cannot defeat the boss	The west and north bosses have more health and hit harder. Get used to the east and south arenas first
The reward did not arrive	Your inventory may have been full. Free up space and run /boss claim
You cannot place blocks in the arena	Breaking and placing blocks and using buckets are prohibited inside and around the arena. Only water buckets (water only) can be used on air blocks, and placed water disappears after 5 seconds