Neverwinter Nights 2 Spells Database: Spell Details
Power Word Stun
Class/Level: Wizard / Sorcerer 8
Innate Level: 7
School: Divination
Component(s): Verbal
Range: Short
Area of Effect / Target: Single
Duration: Instantaneous
Save: None
Spell Resistance: Yes
Installation: Neverwinter Nights 2 (Base)
This spell automatically stuns a single target for a duration based on the target's hit points. Any creature with 151 or more hit points is unaffected by power word stun.

50 hit points or less - 4d4 rounds
51-100 hit points - 2d4 rounds
101-150 hit points - 1d4 rounds