OSRS Forthos Dungeon Guide Everything You Need to Know

The Forthos Dungeon, nestled beneath the Forthos Ruin in Hosidius, Old School RuneScape (OSRS), is a captivating underground temple dedicated to Ralos, the god of the sun, and Ranul, the god of the moon. Known for its rich lore, challenging monsters, and rewarding loot, this dungeon is a must-visit for mid to high-level players. Whether you’re seeking to battle the fearsome Sarachnis, farm valuable drops, or complete the “In Search of Knowledge” miniquest, this guide covers everything you need to navigate the dungeon effectively.

Accessing the Forthos Dungeon is straightforward, with two entrances located in the Forthos Ruin area of Hosidius. No specific quest or level requirements are needed, making it accessible to a wide range of players. However, a combat level of at least 100 is recommended to handle the dungeon’s challenges.

Teleportation Methods

Several teleportation options make reaching the dungeon quick and efficient:

• Xeric’s Talisman: Teleport to Xeric’s Glade, landing just east of the eastern dungeon entrance.
• Kharedst’s Memoirs/Book of the Dead: Use the “Lunch by the lancalliums” teleport to arrive northeast of the dungeon.
• Skills Necklace: Teleport to the Woodcutting Guild, then run north to the western entrance.
• Watson Teleport: Takes you to Watson’s house, just west of the Forthos Ruin.
• Lovakengj Minecart Network: Use the Hosidius West station to arrive south of the Ruin.

Navigating to the Entrances

The dungeon has two aboveground entrances: one via the staircase in the Forthos Ruin and another in the smaller ruins to the east. Both are multi-combat areas, so be prepared for multiple monsters to attack simultaneously. The eastern entrance is closer to Xeric’s Glade, while the western entrance is nearer to the Woodcutting Guild teleport.

Monsters and Combat Strategies

The Forthos Dungeon hosts a variety of monsters, ranging from mid to high combat levels, making it a versatile spot for combat training and loot farming. Below is an overview of key monsters and strategies to tackle them.

Temple Spiders

Found in the Spider’s Den, Temple Spiders (level 75) are a more powerful variant of red spiders. They’re ideal for players looking to farm red spider eggs or complete Slayer tasks assigned by Konar.

• Combat Tips: Use melee with crush weapons for optimal damage. Protect from Melee prayer is recommended in multi-combat areas.
• Loot: Red spider eggs, tattered pages for the miniquest, and other common drops.

Undead Druids

Located in a small chamber south of the Spider’s Den, Undead Druids (level 129) are excellent for ranged training and drop herbs and Herblore secondaries.

• Combat Tips: Use Ranged with Eagle Eye prayer for efficient kills. Bring a slash weapon or knife to cut through spider webs blocking the chamber.
• Loot: Grimy herbs, tattered pages, and occasional high-value drops like ranarr weeds.

Sarachnis The Spider Boss

Sarachnis, a level 318 spider boss, resides in the southernmost burial tomb. She’s a mid-level boss designed for players around combat level 100, offering a thrilling fight with valuable rewards.

• Requirements: Speak to Brother Aimeri and provide five pieces of food to access the lair. A slash weapon is needed to cut through spider webs.
• Combat Tips: Sarachnis has high resistance to Ranged and Magic but is weak to crush melee attacks. Use a weapon like the Sarachnis Cudgel or Abyssal Bludgeon. Protect from Melee and switch prayers to counter her minions’ attacks. Bring high-healing food (e.g., sharks) and a prayer potion.
• Loot: Notable drops include the Sarachnis Cudgel (a 4-tick crush weapon), Giant Egg Sac (containing red spider eggs), and Jar of Eyes (a rare collectible).

Loot and Rewards

The Forthos Dungeon is a goldmine for players seeking both practical and rare items. Here’s a breakdown of the most notable rewards.

Grubby Chest

Located in the southwest corner, the Grubby Chest requires level 57 Thieving to unlock the gate and a Grubby Key (dropped by dungeon monsters) to open.

• Rewards: Food, potions, and treasure like coins and gems. It’s a reliable source of supplies for extended dungeon trips.

Sacred Bone Burner

The Altar of the Sun features a Sacred Bone Burner, offering 3x the base Prayer experience when burning bones, making it a strong alternative to gilded altars for Ironmen.

• Tip: Red dragon bones from the dungeon’s red dragons yield high Prayer XP when used here.

Notable Drops Table

Monster	Key Drops	Use
Temple Spiders	Red spider eggs, tattered pages	Herblore, miniquest
Undead Druids	Grimy herbs, tattered pages	Herblore, miniquest
Sarachnis	Sarachnis Cudgel, Giant Egg Sac, Jar of Eyes	Combat, Herblore, collectible
Various	Grubby Key	Unlocks Grubby Chest

In Search of Knowledge Miniquest

The “In Search of Knowledge” miniquest adds a lore-rich layer to the dungeon, tasking players with helping Brother Aimeri uncover the temple’s secrets.

Starting the Quest

Find Brother Aimeri near Sarachnis’ lair and heal him with five pieces of food (e.g., lobsters or better). Speak to him to learn about the dungeon’s history and the task of collecting tattered pages.

Collecting Tattered Pages

Kill monsters like Temple Spiders (1/30 drop rate) to gather four each of Tattered Sun, Moon, and Temple Pages. These fill three tomes found in the Temple Library.

• Tip: Store tomes in your bank to avoid losing them if you die. Temple Spiders are the fastest source due to their drop rate and low HP.

Completing the Quest

Fill the tomes with pages and deliver them to Logosia in the Arceuus Library for a 10,000 XP lamp (usable on any skill above level 40). Extra pages can be sold to Logosia for 1,000 coins each.

Tips for Success in Forthos Dungeon

To maximize your time in the dungeon, follow these practical tips:

Recommended Gear and Inventory

• Armour: Barrows or better for balanced melee and magic defence.
• Weapon: Crush weapons (e.g., Abyssal Bludgeon, Sarachnis Cudgel) for Sarachnis and general combat.
• Inventory: High-healing food (sharks or monkfish), prayer potions, a slash weapon/knife, teleportation items, and five pieces of food for Brother Aimeri.

General Strategies

• Prayer Management: Use Protect from Melee in multi-combat areas and switch prayers during Sarachnis fights to counter her minions.
• Avoid Cannons: Dwarf multicannons are disabled in the dungeon, so rely on manual combat.
• Multi-Combat Awareness: Stay alert in areas like the Spider’s Den, where multiple monsters can attack at once.
• Loot Efficiency: Prioritize Temple Spiders for tattered pages and red spider eggs, and save Grubby Keys for the chest when supplies run low.

Lore and Easter Eggs

The dungeon is packed with references, like the “Stranger Things” nod in the strange passage’s examine text or the Pokémon-inspired egg sac message. Exploring the Temple Library and Crypt of the Moon reveals more about the Losanium religion and the dungeon’s history.

With its blend of combat, loot, and lore, the Forthos Dungeon is a standout addition to OSRS, capturing the old-school vibe of Taverley Dungeon while offering modern rewards. Whether you’re a mid-level player tackling Sarachnis or an Ironman farming Prayer XP, this dungeon has something for everyone. Gear up, dive in, and uncover the secrets beneath the Forthos Ruin!