Priest in Peril

Walkthrough
Start this quest at Varrock palace by talking to King Roald. He tells you that contact has been lost with the temple and wants you to go and check it out for him. The temple is located east of Varrock. Go through the wooden gate northeast of the east exit. Then follow the path to the temple. Knock on the door and someone will ask you if you will help him by killing the dog. Tell him you will. Climb down the dungeon entrance north of the temple, then kill the level 30 Temple Guardian. You cannot use magic.

Go back and knock on the door again. You will hear the voice from earlier acting very strange, suggesting that you speak to King Roald.

Head back to Varrock Palace and talk to King Roald again. King Roald becomes enraged, and "explains" that the dog was guarding the palace from attack. He instructs you to go back and fix it right away.

If you have high combat level: Before you return, it is recommended that you bring four medium quality (cakes, salmon, lobsters, etc.) food, 22 unnoted rune or pure essence and your empty bucket. You should still have one empty inventory slot. This will save one trip to Varrock and save you a few walking minutes.

If you have low combat level: Bring 27 medium quality (cakes, salmon, lobsters, etc.) food, and an empty bucket. (Alternatively, you may bring 5 medium quality food, 22 unnoted rune or pure essence, and an empty bucket.) An inventory slot will open up when you eat during the long and protracted fight with the level 30 Monk of Zamorak who attacks with either melee or mage. If you wear metal (bronze, iron, steel, or black) armour, the Monk of Zamorak will hit hard regardless of your metal armour, and the Monk of Zamorak's mage attacks will hit extra hard through your metal armour (mage beats melee in the combat triangle). It is therefore recommended that you fight the Monk of Zamorak with ranged as (1) ranged armour will provide modest protection from the Monk of Zamorak's mage attacks (ranged beats mage in the combat triangle),  and (2) you can safespot the Monk of Zamorak with ranged by standing on either the west or east side of a church pew and trapping the Monk of Zamorak on the other side of the church pew. Recommended ranged gear for low-combat-level players: leather cowl, leather body, leather vambraces, leather chaps, leather boots or boots of lightness, cape, amulet of defence or amulet of power, highest level bow you can wield (typically oak longbow or regular longbow), and many bronze (or iron) arrows. If you have prayer level 8 or greater, then it is suggested that you use the level 8 "Sharp Eye" prayer and you will be able to use it for the entire fight since there is a prayer altar in the temple where you can renew your prayer points as many times as required. Just be careful that each time you run to the prayer altar to renew your prayer points, that you quickly run back to the church pew and trap the Monk of Zamorak on the other side, as you will be vulnerable to the Monk of Zamorak's melee attacks when you leave the safespot.

Travel east, and knock on the temple door again. This time, the door swings open. Kill one of the level 30 Monks of Zamorak to get a Golden Key. Go to the top floor (climb either the northeast or southeast staircase on the ground floor to get to the first floor, then climb the ladder in the southwest corner of the first floor to get to the top floor) and use the talk-through option found on the cell door to talk to Drezel. Ask him to tell you about the Holy River, and he will tell you how Saradomin made the river impassable for all that are evil. He says that the river may have been tainted and asks you to help purify it again. He will also tell you that he can't leave with the vampyre still there, and tells you that the water from the river might be able to temporarily seal the vampyre's tomb.

Then go into the dungeon. With the Golden Key, you can unlock the gate in the Temple Dungeon where the Guardian was located earlier. After traversing the path, you will see some monuments. Study them; you will notice one of them has an Iron Key in it. Use the Golden Key on it to swap keys. After obtaining the Iron Key, use your bucket on the well to fill it with murky water.

Go back to the top floor and use the Iron Key on the cell door. Then go inside and talk to Drezel. You will find out that the water is not blessed. He will then bless the bucket of water that you filled earlier and give it back to you. Use it on the coffin to seal the vampyre. Drezel will then tell you to meet him in the dungeon.

Go to the monument room, then go through the gate past it. You will find Drezel there. Talk to him. He will tell you that the river has been unblessed. You suggest using Rune Essence to remove the Zamorakian magic. He tells you it will take 50 Rune Essence to do it (Pure Essence will also work). Note: Drezel will not take noted essence! When you bring the unnoted Essence, talk to him again and give them to him. You can use more than one trip to bring Drezel the 50 Essence.

When you have given Drezel all 50 Essence, the quest is complete!

Reward

 * 1 Quest point
 * 1,406 Prayer experience
 * Access to Morytania
 * Wolfbane dagger (when fighting werewolves in Morytania, this will stop them from changing into their more powerful werewolf form if the dagger is equipped).

Note
It is a good idea to use Varrock Teleport a total of 3 times - one for returning to King Roald, another for 23 or 24 rune essence if you have a staff and everything for the rest of the quest and lastly for the remaining 26 or 27.

Trivia

 * The Temple Guardian still roams around even though it was supposedly defeated during the beginning of the quest.