Underwater City/Guide
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This content is part of the Atlas of Discovery Expansion.
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| This page was last updated for (v1.2.2). |
This is a Barrier dungeon introduced with the 
Atlas of Discovery Expansion, there is a general guide to this dungeon and a more in-depth look into Barrier combat in general in this guide. This page will go deeper into combat options, including when 
Throne of the Herald Expansion is owned and already completed.
This guide is not meant for optimal kills per hour but instead focuses on easily obtainable ways ranging from just passed God Dungeons to having beaten 
Throne of the Herald to clear the dungeon effectively.
Requirements
- Complete
Cult Grounds - Discover
Melantis 
Damage Reduction Potion IV
Recommended
Level 99, 
Level 95, 
Level 75, 
Level 99.
The enemies, and especially the 
Nagaia hit very hard in this dungeon. A lot of damage reduction is required in order to idle this dungeon without dying. Alternatively, the player can return after having progressed through the Throne of the Herald expansion. Having more hitpoints or other damage reducing and damage inflicting bonusses can greatly speed up the clear times of this dungeon. Set 1 clears the dungeon roughly 27 times per hour. Set 2 clears it roughly 8.5 times per hour. (You can swap the weapon & summons in Set 2).
The Preferred Shield is 
Earth Layered Shield, however 
Devouring Barrier Shield can be used, once the upgrade item has been obtained from this dungeon.
Clearing the Underwater City dungeon provides 1 
Barrier God Shard every time it is cleared. These can be used to upgrade (B) god armours into their respective (C) armours. These can then be used to very effectively clear 
Crystal Depths for 
Crystal Binding Dust if the player hasn't already done this.
Below are 2 sets, unlike the previous dungeons, you can't mix and match this dungeon. Set 1 is for post-TotH clears. Set 2 is for clears just before or after 
Impending Darkness Event.
Set 1 requires Level 120.
Set 2 requires a minimum of Level 99. Calculated at all combat skills level 99 in the Combat Simulator.
Set 2 can be all non-B upgraded Terran God Armour and it will only lower the Kills Per Hour by about 2 (from 8.5 to 6.5).
| Item Slot | Set 1 | Set 2 |
|---|---|---|
| Head |  Hood of Shade Summon |
 Terran God Helmet (B)
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| Body |  Terran God Platebody (B) |
Terran God Platebody (B)
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| Leggings |  Terran God Platelegs (B) |
Terran God Platelegs (B)
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| Boots |  Terran God Boots (B) |
Terran God Boots (B)
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| Hands |  Gloves of Greater Shade Summon |
 Terran God Gloves
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| Cape |  Ancient Infernal Cape |
Ancient Infernal Cape
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| Neck |  Amulet of Curse Totem Summon |
 Lesser Summoning Amulet
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| Passive |  Knight's Summoning Defender |
 Barrier Burn Shield
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| Ring |  Ring of Phantom Summon |
 Summoner's Blessed Ring
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| Gem |  Siphoning Barrier Gem or Siphoning Barrier Gem
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| Weapon |  Agile Wings Rapier |
 Infernal Claw
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| Shield | Earth Layered Shield / Devouring Barrier Shield
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| Consumable |  Fervor Scroll |
 Melee Hinder Scroll
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| Summons |  Spider   Spectre |
 Tortoise  Dragon
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Prayers: 
Battleheart and 
Battleborn. Swap to Battleheart and 
Chivalry for Set 2.
Potion: Damage Reduction Potion IV
Point of Interest: 
Dark Waters
The Agility obstacles 9 or higher are not required, 8 and below are highly suggested (and simulations were done with those active).
| Slot | Obstacle | Bonuses |
|---|---|---|
| 1 | Cargo Net | +3% Global GP (except Item Sales) +2% Fishing Mastery XP |
| 2 | Monkey Bars | -4% Firemaking Interval |
| 3 | Pipe Climb | +5% Melee Evasion +5% Melee Max Hit |
| 4 | Cave Climb | -40 Maximum Hitpoints +5% Ammo Preservation +5% Rune Preservation +5% Melee Max Hit |
| 5 | Cliff Balance | +20 Maximum Hitpoints +5% Ranged Accuracy Rating +2 Prayer Point Cost for Prayers +5% Magic Accuracy Rating +5% Melee Accuracy Rating |
| 6 | Rocky Waters | +50 Maximum Hitpoints |
| 7 | Boulder Trap | -20% Chance to Preserve Resources in Skills |
| 8 | Raft Building | +20 Maximum Hitpoints +2% Damage To All Monsters +1% Damage Reduction |
| 9 | Water Jump | +3% Global Mastery XP +8% Magic Max Hit +8% Ranged Max Hit +8% Melee Max Hit |
| 10 | Ocean Rafting | +5% Damage To All Monsters +10% Global Slayer Coins (except Item Sales) +5% Auto Eat Efficiency |
| 11 | Pipe Maze | +5% Damage to Monsters in Dungeons -20% Chance To Double Loot in Combat |
| 12 | Boulder Balance | -20% Global Accuracy +5% of Maximum Hit added to Minimum Hit -0.1s Attack Interval |
| 13 | Rope Trap | -10% Mastery XP for Melvor Realm only +8% Damage To Bosses |
| 14 | Freezing Climb | +30% Accuracy Rating +30% Global Evasion -150% GP from Combat -6% Chance To Double Loot in Combat +15% Damage to Monsters in Dungeons |
| 15 | Waterfall Crossing | -100 Maximum Hitpoints Your Attacks now roll twice (Select highest chance) -10% Global Slayer Coins (except Item Sales) |
| Pillar | Pillar of Combat | +10% Ranged Evasion -0.2s Monster Respawn Timer +5% Flat Slayer Area Effect Negation +10% Melee Evasion +10% Magic Evasion +5% of Maximum Hit added to Minimum Hit +10 Flat HP Regen |
| Elite Pillar | Elite Pillar of Expertise | +8% Mastery XP for Melvor Realm only -3% Interval for all Non-Combat Skills +40% Global GP (except Item Sales) +8% Chance to Double Items Globally |
| Melvor Idle version v1.3 (Released: 13th June 2024) | ||||||||||||||||||||
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| Reference Tables: Items, Equipment, Experience Table, Upgrading Items, Combat Areas, Slayer Areas, Dungeons, Strongholds, The Abyss, Monsters |
