A saving throw gives a character a chance to remove a negative condition or other effect that states "save ends". A successful saving throw is called a save.
At the end of a creature's turn, the creature makes a saving throw against each effect on the character that a save can end. When making multiple saving throws, the creature chooses the order. Each saving throw is a d20 roll.
An effect that includes the words "save ends" is ended when the creature saves. If the effect has an aftereffect, the aftereffect begins after the creature has finished making saving throws.
Failed saving throws
A roll of 1 through 9 on a d20 is a failed saving throw.
Normally, an effect persists unchanged upon a failed saving throw. Effects with "failed saving throw" entries can change after a saving throw is failed, however. If an effect has a failed saving throw effect, and the affected creature makes a saving throw against it at the end of its turn but fails, the failed saving throw effect occurs after the creature has finished making saving throws.
Only saving throws made by a creature at the end of its own turn can cause failed saving throw effects. Extra saving throws granted at any other time carry no risk of failed saving throw effects.[PH2:219][PH3:215][RC:98][HotFL:64][HotFK:64]