The Curse of Arrav

Speak to Elias White at Uzer Oasis — fairy ring then run east to the coast.

In the Mastaba, two skeletons hold mastaba keys: the southernmost in the cave past the first room, and one north-west of the stone boat in the central chamber.

The keys are used automatically on the levers in the north-east and south-east corners, which sit behind wall traps.

Search the odd markings on the walls before walking into them. The traps are the reason this section hurts.

Take the path north-west of Trollheim towards the ice gate, then enter the Trollweiss Dungeon directly west of it.

Protect from Melee is worth having: the ice trolls hit up to 21.

Follow the path north to the crevasse up to the summit. Bring a pickaxe for the caved-in tunnels.

Show Elias the base plans. The vault has human detection spells, a sewage route through the kitchen with periodic energy surges, and a four-digit code on a runite-reinforced door.

The insulated boots are for the energy surges, so do not leave them behind.

Taking the heart brings Zemouregal and Sharathteerk, who send Arrav at level 339 after you.

Zemouregal blocks the exit, so bring a teleport for emergencies. Leaving means returning with insulated boots — but not the grapple or crossbow, since the rematch starts straight after the grapple room.

Dying here leaves your gravestone in the caves past the zombies rather than at the vault.

The Golem guard at level 141 is the other fight in this quest.