Additional Spellcasting Participants
Epic spells may be developed that specifically require additional participants (also called celebrants). Such an epic spell is sometimes called a multiple-caster spell, a mythal, a true ritual, or some other name to describe its extra caster requirement.
The epic spell developed with this factor requires a specific number of additional participants (determined during development) who each must use up one spell slot of a specified level for the day (also determined during spell development)—if the exact number of participants do not partake in the casting, and if they do not each contribute the prescribed spell slot, the epic spell automatically fails. To participate, each celebrant readies an action to contribute their raw spell energy when the primary caster begins the epic spell. Additional spellcasting participants of an epic spell adjust the final Spellcraft DC downward as shown below.
Each additional participant may only contribute one slot (regardless or haste or other abilities that would otherwise provide additional standard actions). The spellcaster type is not important, only the level of the spell slot contributed. Each participant must contribute a spell slot of the level specified by the epic spell. A contributed spell slot is treated as if normally cast. A wizard may contribute either a prepared uncast slot, or an open, unprepared slot. Each participant caster’s Spellcraft DC adjustment stacks.
| Spell Slot Contributed | Spellcraft DC Adjustment | ||
| 1 | -1 DC | ||
| 2 | -3 DC | ||
| 3 | -5 DC | ||
| 4 | -7 DC | ||
| 5 | -9 DC | ||
| 6 | -11 DC | ||
| 7 | -13 DC | ||
| 8 | -15 DC | ||
| 9 | -17 DC | ||
| Epic Slot | -19 DC |
Special: An epic spell that takes longer than one action to cast also requires all extra participants to stand as if casting for the same amount of time. If an extra participant is attacked while contributing a spell slot, the participant must make the requisite Concentration check as if casting a spell of the same level as the slot contributed. If the contributor is disrupted, the epic spell is not ruined; however, the Spellcraft DC adjustment being provided by that caster cannot be applied to the final Spellcraft DC of the epic spell being cast.
Also note of course that psions can benefit from this as well, and they may very well have been the first to do this. The only difference is that a psion has to manifest a power of equivalent level (regardless of the number of power points it costs).
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