Save: Note that the creatures' saving throws are unaffected by the number of recipients (cf. charm person and charm monster), but all target creatures are subject to a penalty of -2 on the saving throw because of the efficiency and power of a mass charm spell.

Effect: A mass charm spell affects either persons or monsters just as a charm person spell or a charm monster spell (qq.v.) does. The mass charm, however,
will affect a number of creatures whose combined levels of experience and/or hit dice
does not exceed twice the level of experience of the spell caster.
All affected creatures must be within the spell range and within a maximum area of 3" by 3".

Mass Charm: See comments on 2nd
level druidic spell charm person or mammal.
Obviously, saving throw modifiers
are applied to each individual affected
as a function of damage inflicted on
that individual by allies of the wizard.
(Imagine #29)