Brine rats are Slayer monsters that can only be fought after the partial completion of Olaf's Quest. They are notable for being the only monsters to drop the Brine sabre. A Slayer level of 47 is required to fight a brine rat, and a spade is required to access the cave. The brine rats are relatively weak, but it is recommended to bring food if you have less than 70 Defence. Olaf has an infinite fire located beside him, and the unnoted raw swordfish drops can be collected and cooked on the fire, just outside the brine rat cave. Brine rats can also be killed as an alternative for a rat slayer assignment provided the player has 47 Slayer.
- Brine Rat Cavern
- The cave that is accessed during Olaf's Quest via using a spade to dig in a spot south of the Windswept tree. It is near the entrance to the polar hunter area, northeast of Rellekka. Use a spade to dig next to the tree up the hill to enter the cave. The fairy ring code DKS will take you close to where you dig.
Item Quantity Rarity GE market price Raw rat meat 18 (noted) Uncommon 486 Raw pike 18 (noted) Uncommon 1,116 Raw lobster 10 (noted) Uncommon 2,200 Raw shark 3; 8; 9 (noted) Uncommon 1,878–5,634 Raw swordfish 9 Rare 2,988 Raw shark 1 Rare 626
Item Quantity Rarity GE market price Death rune 7 Common 1,617 Air rune 18 Uncommon 90 Earth rune 10; 18; 36 Uncommon 50–180 Water rune 10; 18 Uncommon 50–90 Blood rune 4 Uncommon 1,068
Item Quantity Rarity GE market price Coins 1; 2; 4; 29; 30 Common Not sold Water talisman 1 Uncommon 183 Brine sabre 1 Rare (1/512) 147,588