Editing Yagura:SRD:Casting Spells (section)

=====Stacking Effects=====

Spells that provide bonuses or penalties on [[Yagura:SRD:Attack Roll|attack rolls]], [[Yagura:SRD:Attack Damage|damage rolls]], [[Yagura:SRD:Saving Throw|saving throws]], and other attributes usually do not stack with themselves. More generally, two bonuses of the same type don’t stack even if they come from different spells (or from effects other than spells; see Bonus Types, above). 

======Different Bonus Names======

The bonuses or penalties from two different spells stack if the modifiers are of different types. A bonus that isn’t named stacks with any bonus.

======Same Effect More than Once in Different Strengths======

In cases when two or more identical spells are operating in the same area or on the same target, but at different strengths, only the largest or most powerful one applies.

======Same Effect with Differing Results======

The same spell can sometimes produce varying effects if applied to the same recipient more than once. Usually the last spell in the series trumps the others. None of the previous spells are actually removed or dispelled, but their effects become irrelevant while the final spell in the series lasts.

======One Effect Makes Another Irrelevant======

Sometimes, one spell can render a later spell irrelevant. Both spells are still active, but one has rendered the other useless in some fashion.

======Multiple Mental Control Effects======

Sometimes magical effects that establish mental control render each other irrelevant, such as a spell that removes the subjects ability to act. Mental controls that don’t remove the recipient’s ability to act usually do not interfere with each other. If a creature is under the mental control of two or more creatures, it tends to obey each to the best of its ability, and to the extent of the control each effect allows. If the controlled creature receives conflicting orders simultaneously, the competing controllers must make opposed Charisma checks to determine which one the creature obeys.