Some rituals allow than one person can work together to combine their efforts. Not only can different people pool their Essence together, as they are able, to enact a certain ritual, but multiple people working together may also give a bonus to the spellcasting roll (the roll is made by the person leading the ritual, referred to as the 'lead caster'). Note that those assisting in a ritual need not necessarily know the spell in question, or even be aware that they are aiding in the casting of a spell (this is the basis for various temple rites). The bonus gained by multiple participants is equal to the cube root of the number of people participating in the ritual, round down. For those who are mathaphobic or just prefer tables, this translates as follows:
Participants Bonus 2-7 +1 8-26 +2 27-63 +3 64-124 +4 125-215 +5And so forth. Note that the bonus for multiple participants in a ritual cannot exceed the lead caster's combined Ritual Magic skill and PRE attribute bonus.