Handy Chart for calculating Spell Magnitudes

Base1 mag2 mag3 mag4 mag5 mag6 mag7 mag8 mag9 mag10 mag
12345101520253035
234510152025303540
3451015202530354045
45101520253035404550
5101520253035404550NA
101520253035404550NANA
1520253035404550NANANA
20253035404550NANANANA
253035404550NANANANANA
3035404550NANANANANANA
ParameterBase1 magnitude2 magnitude3 magnitude4 magnitude
RangePersonal (the caster himself, items he is wearing, and possibly carrying)TouchVoice
DurationMomentary (up to 6 seconds)ConcentrationSun (until next Sunrise or Sunset)Moon (up to 28 days)Year* (Up to 365 das)
Diameter (2 minutes or 12 rounds)
TargetIndividualPart (part of one thing)Group (up to 10 individuals which can be linked in some manner)Structure (one building)Boundary* (anyting within a well defined boundary)
Room (individuals within a clearly delimited room)
Base Sizes of Individual/Part
AnimalUp to +1 (pony)
AquamSee page 121
AuramSee page 125
CorpusHuman shape up to +1 size
Herbam1 cubic pace
IgnemLarge campfire, or fire in hearth of a great hall
Imaginemhuman up to +1 size
MentemNo base Individual size
Terram10 cubic paces dirt, 1 cubic pace stone, base metals 1 cubic foot, precious metals 1/10 cubic foot, gemstones 1 cubic inch*
VimSee page 157
Base Group:Mass of 10 Standard Individuals
Base RoomLarge Enough to hold 100 standard individuals
Base StructureTen Base Rooms
Base BoundaryAn area equal to a circle with a diameter of 100 paces or 70,650 square feet
Increases in size: multiply size by 10 for each magnitude added to the spell, can also be applied to targets Room, Structure and Boundary to increase the areas they effect

First two charts stolen from Arthur on the Atlas Forum

Handy Chart for calculating Spell Magnitudes

In the Ruins of Bibracte jonathanlink jonathanlink