Power to use the abilities of wendigo. Variation of Mythic Physiology. User with this ability either is or can transform into an Wendigo: a malevolent cannibalistic spirit strongly associated with the Winter, the North and coldness, as well as with famine and starvation. It was variously a malevolent cannibalistic spirit that could possess humans or a monster that humans could physically transform into, with those who indulged in cannibalism were at particular risk.
Wendigo page from The Supernatural Kickstarter's John Winchester Journal replica. For sale this Summer on Kickstarter. Follow link for more info: http://www.thenerdpirates.com/supernatural-kickstarter.html