The quest is In Aid of the Myreque in OSRS, where you unlock the ability to make the Rod of Ivandis.

What to know

  • You make the rod during or after that quest, not in a later one.
  • The process involves crafting the rod of Ivandis from a silvthrill rod, then enchanting it and dipping it in the well at the Saradomin Shrine.
  • It’s also used later for the Ivandis flail.

Quick answer

If you’re asking “what quest unlocks it?”, the answer is In Aid of the Myreque.