From D&D Wiki
 Changes From the Original SRD
Added (from Abilities and Conditions):
- " In most cases, the character makes a Will saving throw to resist this effect, and a failed roll means that the character is shaken, frightened, or panicked."
- "Becoming Even More Fearful"
- "Fear effects are cumulative. A shaken character who is made shaken again becomes frightened, and a shaken character who is made frightened becomes panicked instead. A frightened character who is made shaken or frightened becomes panicked instead."
- " Frightful presence is a mind-affecting fear effect."