One-Use Powers

One-Use Powers is found on page 112 of 4e's GURPS Supers.
It is adapted from the One Use Only guidelines for inventions found earlier in the book.
It is an even cheaper possibility than Limited Use to apply to abilities.
It does, however, require both a Power Talent and Ultrapower.
Guidelines are vague requiring GM to assign descriptors:
*Titanic
*Legendary
*Awesome
*Transcendant
Category:Rules