Making Magical Concoctions (SNS)

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When apothecaries reach 7th level, they can make magical concoctions. This includes all potions, oils, and other kinds of miscellaneous magical items of a concocted nature, including: candle of invocation, dust of appearance, dust of disappearance, dust of dryness, dust of illusion, dust of tracelessness, dust of sneezing and choking, incense of meditation, incense of obsession, Keoghtom's ointment, Nolzur's marvelous pigments, smoke powder, sovereign glu e, and ultimate solvent. 
Making a magical concoction is just like making a normal one. First the apothecary must research a recipe and successfully brew it. However, researching and concocting magical items is much more expensive, in time and gold, than researching more mundane mixtures. 
== Researching Magical Formula==
In order to research magical formulas, the DM must first determine the item's equivalent spell level. This is equal to the magical item's XP value divided by 100, rounded up. Thus, a potion of invisibility (worth 250 XP) is the equivalent of a 3rd-level spell (250 XP-:-100 XP =2.5 rounded up to 3). 
The research time for magical concoctions is two weeks per equivalent spell level. In addition, this research costs 500 gp per equivalent spell level. Researching a potion of invisibility, for instance, would take six weeks and cost 1,500 gp. 
Once the apothecary completes his research, he must make a Concocting proficiency check. If it succeeds, the apothecary discovers the correct recipe. If he fails the check, the apothecary cannot attempt to research that particular recipe again until he reaches another level. 
An apothecary can have recipes for as many different types of magical items as he likes. However, many of these recipes call for expensive and exotic ingredients, so wary DMs can control any potential abuses of this power.
==Cooking Up a Magical Concoction==
Cooking up a magical concoction is more involved than simply tossing all the ingredients together. It often requires gathering all sorts of strange and exotic bits and pieces to complete the recipe. For more ideas about how to handle this, consult the DUNGEON MASTER Option: High-Level Campaigns book. 
Making a batch of a magical concoction requires one full week of uninterrupted work and costs the item's XP value in gold pieces. The price of any rare or exotic ingredients should also be added to the overall cost of brewing. 
Once the apothecary finishes the batch, he must check against his Concocting proficiency. If the check succeeds, he creates the potion. 
If the apothecary rolls a 20, however, he must roll on the Eureka Table to determine the results of his critical failure. Because of the highly unstable nature of magic, the apothecary adds +2 to his Eureka Table roll. Thus, it is more dangerous to make a mistake while brewing a magical concoction. 
The apothecary must identify any accidental magical or mundane discoveries, and research the material before he can discover the exact formula for it. An apothecary gets a +1 bonus to researching a recipe for something he has accidentally created.
==Mixing potions==
An apothecary can do a lot to prevent disasters when mixing different magical potions together. In order for the apothecary to bring his expertise to bear on the situation, he must spend a t least one day examining the two potions. After this time, the apothecary makes a Concocting proficiency check. 
If the apothecary succeeds, the DM should note the result of the roll. When the DM rolls on Table 111: Potion Compatibility in the DUNGEON M ASTER Guide, he ignores any results less than the apothecary's concocting check result. 
If the apothecary fails his concocting check, the DM should roll regularly on the Potion Compatibility table. 
For instance, an apothecary with an Intelligence of 16 and one slot of the Concocting proficiency attempts to mix two potions together. After two days of research, he gives it a shot. He needs a 14 or less to succeed at his concocting check. He rolls a 9. This means that the lowest result possible for the compatibility check is a 9. 
A clever apothecary will examine newly mixed concoctions before imbibing them. The cautious alchemist can know the results of the miscibility check if he makes a successful Concocting check. If the apothecary fails this check, he cannot try again until next level. If he rolls a 20 on his proficiency check the DM should roll again o n the Potion Compatibility table and report the second result instead of the first one.