Power Word Stun

SchoolEnchantment (Compulsion) [Mind-Affecting]
LevelSor/Wiz 8, War 8
ComponentsV
Casting Time1 standard action
RangeClose (25 ft. + 5 ft./2 levels)
DurationSee text
TargetsOne creature with 150 hp or less
Saving ThrowNone
Spell ResistanceYes

You utter a single word of power that instantly causes one creature of your choice to become stunned, whether the creature can hear the word or not. The duration of the spell depends on the target’s current hit point total. Any creature that currently has 151 or more hit points is unaffected by power word stun.