Winter Witch Abilities in Pathfinder: Wrath of the Righteous covers all the special abilities, be it passive or active, that one of the thirteen Prestige Classes of the game possesses.
Winter Witch Features/Abilities
Winter Witch Spellbook
When a new Winter Witch level is gained, the character gains new Spells per day as if she had also gained a level in the witch or shaman spellcasting class she belonged to before she added the prestige class and any one divine spellcasting class she belonged to previously. Additionally, at 2nd level, and every 2 level after, a Winter Witch gets a new hex depending on the chosen spellcasting class.
At 1st level, a Winter Witch's mastery of the cold becomes so great that any Spell with cold descriptor she casts has its saving throw DC increased by 1. Additionally, all Spells with fire she casts have their saving throw DC decreased by 1.
At 5th and 10th level, this bonus and penalty are increased by 1, up to a maximum of 3.
Winter Witch levels stack with Shaman levels to determine the power of witch hexes and access to major and grand hexes, and for acquiring patron spells.
At 3rd level, a Winter Witch's Spells become incredibly cold, increasing their caster level by 1. At 6th level, this bonus increases to 2.
At 8th level, a Winter Witch's Spells that deal cold damage become horrendously cold. Half the cold damage caused by these effects comes from an otherworldly power and is not subject to being reduced by resistance or immunity to cold-based attacks.