Cerberus in Arise Ragnarok
Infernal Castle, one room, 5,000 EXP, mine before the boss, and why solo is often easier.
Cerberus is the Infernal Castle boss in Arise Ragnarok: one room, one three-headed dog, about 5,000 EXP, and 1–3 chests. The portal sits just outside the Guild Building. If you can survive the HP pool, it is the fastest public dungeon on the shard. The game has been live since October 18, 2025 on 16-player servers. This is not the 100-room Infernal Castle from Arise Crossover, and it is not a Cerberus mount farm.
Full portal list and timers live on dungeons. This page is the dog.
Where the portal is, and when
PGG: Infernal Castle (also written Castle Infernal) spawns just outside the Guild Building — the tall CLGAMES high-rise with the shop and merge NPCs. Public dungeons appear at :00 and :30 and despawn after about 15 minutes. Each of the four city dungeons has an equal chance to be the one that appears. You do not spawn Cerberus yourself. Track the clock with the dungeon schedule.
Interact with the gate to go solo, join a raid party, or create one. You can re-enter while the world portal stays up. That is why a five-minute leftover window still has a job: one room, one boss, out.
PGG lists Infernal Castle among the toughest city runs because Cerberus has a massive health pool. Goblin Cave is the easy seven-room alternative at the southwestern construction site. If you are undergeared, pick Goblin. If the gate is about to die and you can live through the slam, pick the dog.
The room, the loot, the army
One room. No insect halls. No six goblin packs. You load in facing Cerberus. Skills 1–4, Q dash, and the summoned army are the whole fight. Controls do not change.
Rewards on PGG’s location table: 5,000 EXP and 1–3 chests. The same site’s beginner article mentions 30,000 EXP — an internal PGG conflict. Use 5,000 as the table number and trust your popup. Chests roll class-locked weapons. A Mage staff on an Assassin is a sell. Extra Chest (399 Robux) adds a roll; 2x Luck (799) is the expensive drop-rate pass. Neither is required to learn the room.
Arise the boss if you can. Do not Collect Cerberus for two coins of essence; you want the shadow more. Assassin-type and dungeon-boss shadows are the DPS line on the shadows guide and the shadows tier list.
Mine first, then kill (eject)
Highlighted crystals can spawn in this room too. Mine them before the boss dies. Killing Cerberus can teleport the party to the city and leave ores on the floor. That is the most expensive I-was-almost-done mistake in the game. Full crystal-to-coin steps: mining.
If a stranger is already hitting the dog, say so in chat and mine anyway. Extra Chest rolls do not replace abandoned crystals.
Solo versus a pickup party
Fan reports that enemy HP scales with party size. That is a community claim, not a PGG formula. It matches what a lot of hunters feel: solo is often easier if you can survive, because the bar does not inflate with eight random people. PGG still says people do solo these, and suggests waiting until around level 500 with multiple skills, a real weapon, and about five shadows for a comfortable city solo. That is a guideline. A coordinated pair of lower levels can beat a solo 500 who never Arises.
Mage AoE is less relevant in a one-room boss. Assassin, Warrior, and Tank shine because the fight is single-target uptime, not pack delete. Healer is a party contract if someone else is eating the slam. Mage still works if the army is carrying the target; do not stand in the hitbox to help.
Build from stats and builds. VIT so you are not one-shot. Class main stat so the kit exists. MNA so you can Arise after a wipe-and-re-enter.
Keys, codes, and what this is not
Igris is later content opened with keys, not this plaza portal. The live DUNGEONKEY code currently grants three Igris Dungeon Keys. Older IGRIS / ELF chest codes sit on expired codes. Do not spend first Igris keys learning Cerberus — learn the dog on the public gate.
Fan videos name Demon Castle as if it were a different dungeon. Treat that as an unconfirmed alias for Infernal. Navigate by the Guild plaza, not by the title card.
After the kill: elevator, sell crystals 1:1, dump duplicates into merging, check the Store refresh. If the world portal still exists, go again. When it dies, walk quests until :00 or :30.
Frequently Asked Questions
Quick answers for Arise Ragnarok on Roblox.
Where is Cerberus in Arise Ragnarok?
Infernal Castle, one room, portal just outside the Guild Building. Public gates spawn at :00 and :30. See dungeons and the dungeon schedule.
How much EXP does Cerberus give?
PGG's location table lists about 5,000 EXP and 1–3 chests. The same site's beginner article mentions 30,000 — use 5,000 as the table number.
Should I mine before killing Cerberus?
Yes. Killing the boss can eject the party and leave crystals on the floor. Mine first. Steps on mining.
Is solo easier than a party?
Often, if you can survive. Fan reports say HP scales with party size. PGG still treats solo as possible around level 500 with a real weapon and about five shadows.
Which class is best for Cerberus?
Is this the same as Igris?
No. Igris is keyed later content. Get Igris keys via codes (DUNGEONKEY), not from this plaza portal.