Saving Throws (3.5e Variant Rule)
From D&D Wiki
|This material is published under the OGL|
Psychic skills that affect other creatures allow a saving throw to negate or reduce their effects. This is generally a Will saving throw, and the DC of the save is equal to 10, plus half the psychic’s ranks in the psychic skill (rounded up), plus the skill’s key ability score modifier. So a psychic with 7 ranks in Domination and Cha 16 has a DC of 17 for targets to resist: a base of 10, plus 4 for the skill ranks (7 divided by 2 = 3.5, rounded up to 4), plus 3 for the psychic’s Charisma modifier. All psychic skills follow this method of determining their saving throw DCs unless noted otherwise.