ClairaudienceThis functions much the same as the 3rd level Clairvoyance spell, so it is also 3rd level.
Control AnimalSimilar to the Ring Spell Animal Control, it specifies that the spell affects only normal or giant animals, not fantastic ones; however, it does not specify small, medium or large. Regardless 3d6 animals are controlled without a save. This suggests a 5th level spell.
Control DragonThere are several types of this spell — each one tailored to a specific type of dragon (interestingly, Holmes only has stats for four types, whereas Cook suggests there are six). This spell controls 1-3 dragons and there does not seem to be a saving throw. This suggests a 6th level spell.
Control GiantSimilar to Control Dragon, there are different versions for each type of giant and it controls 1-4 individuals without a saving throw. Another 6th level spell.
Control HumanThis is identical to the Ring Spell.
Control PlantThis is similar to the Ring Spell as well.
Control UndeadThis controls 3d6 HD of undead, seemingly without saving throws. This seems to duplicate the reverse of Turn Undead. Given that it takes a 9th level Cleric to automatically turn every type of undead, this spell should only be available at 9th level or later. Thus, it is a 5th level spell.
DiminutionThe closest extant spell to Diminution is Polymorph Self, a 4th level spell. Since the transformation is less powerful (there is only one form — a 6" tall version of the target), it suggests a 3rd level spell.
Gaseous FormSimilar in effect as Dimension Door (a 4th level spell) without the benefit of not being a gas that cannot affect its surroundings. Thus, it is a 3rd level spell.
Giant StrengthThis is a specific version of Polymorph Self, but without the external physical change. This suggests a 4th level spell.
HeroismThis is similar to Giant Strength, although it has a diminishing affect the higher level the target. This suggests a 3rd level spell.
InvulnerabilityThis is a super-version of Protection from Evil and Bless. This suggests 3rd level spell.
LongevityThis is not similar to any extant spell and is extremely powerful. This not only suggests a 6th level spell, but a very expensive physical spell component (say, 10,000+ gp per year gained through the spell).
Treasure FindingThis is similar to the Wand Spell Metal Detection; however, it is more specific. This suggests a 2nd level spell.
Potion Spell Table
- Clairaudience (3rd level)
- Control Animal (5th level)
- Control Dragon (6th level)
- Control Giant (6th level)
- Control Undead (5th level)
- Diminution/Growth (3rd level)
- Giant Strength (4th level)
- Heroism (3rd level)
- Invulnerability (3rd level)
- Longevity (3rd level)
- Treasure Finding (2nd level)
- Roll Twice