Nagaynezgani

Nagaynezgani, or "Slayer of the Alien Gods" 

They are ye'i, at least in the sense that they are impersonated by masked dancers, but are perhaps in a class by themselves.

 See

http://en.wikipedia.org/wiki/Din%C3%A9_Bahane%CA%BC

Under the section "Monster Slayer Twins"

Or for more information:

http://www.twinrocks.com/legends/33-hero-twins-monster-slayer.html

<p style="line-height: 15.75pt; margin: 0in 0in 10pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN">http://navajopeople.org/blog/nayenezgani-navaho-slayer-of-alien-gods/

<p style="line-height: 15.75pt; margin: 0in 0in 10pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN">http://glitternight.com/2012/04/25/navajo-myths-god-slayer/

<p style="margin: 0in 0in 10pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-line-height-alt: 15.75pt; mso-outline-level: 1"><span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 24pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN; mso-font-kerning: 18.0pt">anaye <span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 24pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN; mso-font-kerning: 18.0pt">

<p style="line-height: 15.75pt; margin: 0in 0in 0pt"><span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN">by Micha F. Lindemans

<p style="line-height: 15.75pt; margin: 0in 0in 0pt"><span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN">The Navajo name for unnatural or alien spirits, a grouping of giants and monster who were born to virgins who had engaged in unnatural practices. Many of the anaye were slain by the twins Nayanezgani and Thobadzistshini upon their return to earth, but even they were unable to overcome them all. They sought the help of their father Tshohanoai, the Sun-Bearer, who presented them with four magical hoops. Using these hoops, their mother Estanatlehi sent a terrible storm which destroyed all but four of the anaye, but the storm reshaped the very Earth as well.

<p style="line-height: 15.75pt; margin: 0in 0in 10pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN">The four remaining anaye were Cold, Hunger, Poverty, and Old Age. They were allowed to live after they had convinced Estanatlehi that, if they died, mankind would no longer prize the good things of life, or even life itself.

<p style="line-height: 15.75pt; margin: 0in 0in 10pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><span lang="EN" style="font-family: 'Helvetica', 'sans-serif'; color: #d5d4d4; font-size: 10pt; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN">Among the anaye were also Theelgeth, a hairy, headless monster; the feathered Tshanahale; the limbless twins Binaye Ahani, who killed men with a mere glance; Yeitso, a fearsome giant; and Delgeth, a flesh-eating antilope.