The Sewer is filled with Levels 13 and 24 Zombies, Levels 22 and 25 Skeletons, and the mightiest of all, the famous Level 1 Rat. There is also an Anvil where you find Ruantan for the Desert Treasure Quest, he is the Person who helps you find the Blood Diamond. The two Entrances are located by the Bandit Jail (Where Prince Ali is being held) and by a pile of Rocks around the back of the Witches House.

Recommended Anvil Mining/Smithing/Magic exploitation for Non-Members:

Requirements: 55 Mining, 55 Magic, 68 Smithing

Inventory: Fire Staff (equipped), Rune Pickaxe, Lots of Nature Runes, 1 Hammer and 1 Gold Piece (as a placeholder)

Method:

1. Mine Mithril Ore and Coal at the Lumbridge Swamp Mine
2. Cast the Superheat Spell on them turning them into Mithril Bars
3. Once you have 20 Mithril Bars, walk to the Anvil via the Jail House Entrance
4. Smith them into 4 Mithril Plates
5. High Alchemy the Plates
6. Run back to the Mine and repeat