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All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members.
Herblore
Making Potions - Extreme Magic
Level 91
General Description: Making extreme magic potions.
Creation/Revision Date: January 19, 2010
Skill Requirements: Herblore(91)
Quest Requirements: --
Equipment Requirements: Mortar and pestle
Other Requirements: --
Additional Info: --
Level-Specific Activity Details (P2P)
Level 91+ (P2P)
Description
Making extreme magic potions at Castle Wars Bank using a magpie familiar.
Location
Castle Wars Bank
Multitasking Suitability
1
Level-Specific Requirements
--
Activity Parameters (As Evaluated for Skill and Level)
Skills
Herblore(91+), Summoning(47)
Quests
--
Equipment
Mortar and pestle
Familiar
Magpie
Other
--
Input and Output Items and Values
Total Input Value
2,911,488 gp
Input Items and Item Values
Magic potion (3)[985]
2,516,675
Mud rune[985]
392,030
Magpie pouch[1.8]
2,782
Total Output Value
3,801,858 gp
Output Items and Item Values
Extreme magic (3)[985]
3,775,012
Magpie foragings[1.8]
26,845
Herblore XP
Herblore XP Total
246,250
Herblore XP by Item
Extreme magic (3)[985]
246,250
Skill Activity Ratings (Primary Skill)
Skill Activity Speed (SAS, XP/hr)
246,250
Skill Activity Profitability (SAP, gp/hr)
890,370
Skill Activity Efficiency for 100k gp/hr Opp. Cost (SAE100k)
+965.82
Skill Activity Efficiency for 250k gp/hr Opp. Cost (SAE250k)
+782.52
Skill Activity Efficiency for 500k gp/hr Opp. Cost (SAE500k)
+477.02
Skill Activity Efficiency for 1M gp/hr Opp. Cost (SAE1M)
-0.45
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Analysis, Discussion and Tips for Success
General Discussion
One of the new high-level Herblore items is the extreme magic potion, which is made by adding ground mud runes to a regular magic potion. When it was first introduced, the extreme magic potions increased the damage done by a player's spells by a whopping 40%. Jagex later changed the potion -- and how Magic worked -- so that boosts to the skill via potions and other effects increase magic damage by 3% per level, and made this potion boost magic by +7. Thus, it increases damage from offensive spells by 21%, or about half what it formerly did.
This potion takes longer to make than some of the other extreme potions, because ground mud runes are untradeable -- you have to grind them yourself, one at a time.
Like all of the high-level potions, extreme magic pots are untradeable, but they are far from worthless. Items that boost magic damage are considered useful, but much of the current value of regular magic potions is tied to their ability to be used to make this potion. I have set this potion's value to double that of a regular magic potion. Part of this is because of the extra Herblore XP you can get using this potion to make overload potions.
Location and Access
You can make potions at any bank, but a one-click bank like Castle Wars is preferred.
Required and Recommended Equipment
You need a mortar and pestle.
Required and Recommended Supplies
No supplies are required, aside from the magic potions and mud runes.
Familiar Suggestions
Summon a foraging familiar to earn extra money for you while you work -- I prefer the magpie, given the high value of rings and gems today.
Technique and Tips
First, grind mud runes. Take out a mortar and pestle and a stack of mud runes; click the mortar and pestle and then the mud runes and ground mud runes will appear in your inventory. (Oddly enough, the runes are no longer stackable once ground!) Now click the mud runes and then the mortar/pestle, alternating back and forth 26 times. Bank the ground runes and repeat as needed.
When ready to make the extreme magic potions, take out 14 ground mud runes and 14 magic (3) potions (in that order). Click one ground rune and one potion; when prompted, right-click the main message area and choose "Make All". Wait for the potions to be made, bank and repeat.
All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members.
All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members. 
