Corrupted Seren Stone

Corrupted Seren Stone
Release	10 November 2014 (Update)
Members	Yes
Quest	No
Location	Prifddinas
Actions	• Cleanse • Examine
Examine	The stone is corrupted with black ooze from the Poison Wastes.
Advanced data
Object ID	94048
Links	MROD94048
doc • Talk page

The Corrupted Seren Stone is the largest piece of Seren which is located in the Hefin cathedral in the Hefin clan district in the north-west part of Prifddinas. Inside the cathedral reside Hefin monks. These monks sell cleansing crystals for 110,000 coins each which can be used on the Corrupted Seren Stone for 9,800 Prayer experience each, if uninterrupted, over two minutes. When the Voice of Seren is active in the Hefin Clan district, cleansing crystals will give an additional 20% Prayer experience, for a total of 11,760 experience.

Cleansing one crystal completes the hard Tirannwn achievement A Clean Slate.

Cost and XP analysis

Coins per XP	No bonuses	With 1 First Age item	With 2 First Age items	With 3 First Age items	With 4 First Age items	With 5 First Age items
	-11.22	-11.11	-11	-10.9	-10.79	-10.59
	With Voice of Seren	With Voice of Seren +1 First Age item	With Voice of Seren +2 First Age items	With Voice of Seren +3 First Age items	With Voice of Seren +4 First Age items	With Voice of Seren +5 First Age items
	-9.35	-9.26	-9.17	-9.08	-8.99	-8.82

Update history

This information has been compiled as part of the update history project. Some updates may not be included - see here for how to help out!

• update 10 November 2014 (Update):
  • Added to game.