Gleason's Gielinor Guide

This quest has an in-depth guide.

It contains a more detailed description of dialogue, cutscenes, and storyline.

Details

Start point	Talk to King Arthur in Camelot. Show on map
Official difficulty	Intermediate
Official length	Short
Description	King Arthur is sending out his knights on a quest for the famous Holy Grail. If you are a Knight of the Round Table go to King Arthur for further orders.
Requirements	Completion of the following quests: Merlin's Crystal 20 Attack ^{[not boostable]} ^{[not required to start]} Must be able to defeat a level 120 Black Knight Titan (can be safespotted or flinched)
Items required	Excalibur
Recommended	50 Combat level Melee is highly recommended as the Black Knight Titan has +1000 magic and ranged defence A Halberd may be used to avoid taking damage entirely, but the final damage must be dealt with Excalibur If below 41 combat, a method to cure poison Any pickaxe to complete an easy Karamja Diary task (requires 40 ) Fast travel to several locations Camelot to start the quest, plus 2 additional trips - Camelot Teleport Galahad's house (1 trip) - combat bracelet to the Ranging Guild or skills necklace to the Fishing Guild Draynor Manor (1 trip) - Draynor Manor teleport or amulet of glory to Draynor Village Entrana (1 trip) - Balloon transport system or via Port Sarim using the Explorer's Ring 2 or Rat Pits minigame teleport Brimhaven (1 trip) - Brimhaven teleport, Teleport to House (Brimhaven), via a charter ship or via Captain Barnaby's ship from Ardougne using the Ardougne Teleport or Ardougne cloak Fisher Realm (1 trip) - fairy ring BJR or Brimhaven options listed above Goblin Village (1 trip) - Goblin village sphere, Balloon transport system, Falador teleport or Teleport to House (Taverley)
Enemies to defeat	Black Knight Titan (level 120)
Ironman concerns	The player briefly visits Entrana.

Walkthrough

King Arthur & Merlin

Note: If you start the quest with the required/recommended weapons and armour, you will have to bank everything before travelling to Entrana.

Talk to King Arthur. ( 1•1)…
1 Tell me of this quest.
1 I'd enjoy trying that.
Talk to Merlin. ( 1)…
1 Thank you for the advice.
- He will now be found on the 1^st floor^[UK]2^nd floor^[US], in the room with the cauldron. Go up the main staircase and head to the eastern room. He won't show up as a yellow dot on the minimap until you have entered the room.

Searching for the Holy Grail

Bank all weapons and armour. Travel to Entrana.
Talk to the High Priest in the chapel. ( 3)…
3 Ok, I will go searching.
Travel to Galahad's house west of McGrubor's Wood (fairy ring code ALS) or combat bracelet to Ranging Guild.
Talk to Galahad and receive the holy table napkin. ( 4)…
4 I seek an item from the realm of the Fisher King.
- (Talk to Galahad again to complete a task in the Kandarin easy diary ( 3)…
  3 Do you get lonely here on your own?
  )
Travel to Draynor Manor's 2^nd floor^[UK]3^rd floor^[US] southern-most room with the holy table napkin in your inventory and pick up 2 magic whistles from the table. The whistles will not be visible until you enter the room.

The Fisher Realm

To fight the Black Knight Titan, bring armour, Excalibur, food, and one magic whistle. Note he is extremely resistant to Ranged and Magic, so melee is recommended. Bring antipoison if your combat level is lower than 41. You can use another weapon for a majority of the fight with the Black Knight Titan, but you must use Excalibur for the last hits. Note: He will heal to full health if your last attack is with something other than the Excalibur. Bring pick axe for Karamja Easy Diary Task

The location to blow the magic whistle.

Prepare for the fight against the Black Knight Titan.
Travel north-west of Brimhaven to the north-western peninsula (see the minimap image).
optional* mine gold ore south west of pillars for Easy Karamja Diary Task
Stand under the tower and blow a magic whistle to be teleported to the Fisher Realm.
Fight the Black Knight Titan nearby on the bridge and kill the titan with Excalibur. See the in-depth quest guide for details.
Head south along the river and talk to the fisherman. ( 2)…
2 Any ideas how to get into the castle?
Head to the castle, south-west of the fisherman, pick up the Grail bell from the ground and ring it. (You must stand in front of the bricks to gain access to the castle. Make sure NOT to use the Magic Whistle or you will be teleported outside and you will have to fight the Black Knight Titan again.)
Take the stairs to the south, and talk to the Fisher King. ( 2•1)…
2 I seek the Holy Grail.
1 You don't look too well.
(Make sure to talk to him about both options or you will have to kill the Black Knight Titan again if you leave.)

Finishing up

Items needed: 2 magic whistles, Falador teleport

Travel to Camelot and talk to King Arthur. Make sure to have 1 empty slot in your inventory for Magic gold feather he gives you.
Travel to Goblin Village.
Use the Open option on the sacks in the house in the east side of Goblin Village.
Talk to Sir Percival, he will take your magic whistle. Make sure you have another to get to the Fisher Realm yourself. ( 2)…
2 Come with me, I shall make you a king.
Travel back to the Fisher Realm (via Brimhaven or using the fairy ring code BJR. You do not need to fight the Titan again either way)
Head to the top floor of the castle's eastern tower and take the Holy grail.
Return to King Arthur.
Congratulations, quest complete!