You issue a psychic command that instantly kills one creature of your choice by shutting down its mind. Creatures with more than 90 hit points are unaffected by urge extermination.
For every additional power point you spend, you can affect a creature with 10 more hit points. For example, if you spend 20 additional power points when manifesting urge extermination, you can affect one living creature with 110 or frewer hit points.
by saeomon » Strictly average save-or-die.