Being the GM that I am I'd say it would be awesome to later have it come back as severely weakened and constantly in need of feeding (as it's loosing power). In another campaign....with different characters...of course... :)
--1 demon hunting mortal with a magic gun akin to a sword of the cross
1 warden, realizing he's not getting out of this, sells out to a fae on par with the erlking for that fae's help. (plays out scene, loses character sheet)
The other warden levels a death curse at the skinwalker with the intent that it bleed power continually (akin to papa raithe not being able to feed, just steadily lose power it gained).
The mundane human has had a wendigo spirit semi-dormant (changed trouble aspect, but gave no powers) gave into the temptation, ate a bit of the dead wizard, gained wendigo powers.
The demon hunter unloads his magic gun (using up the last of its special ammo)...firing much faster than the gun is normally capable of as his death scene. Also, as part of this bit of deathscene, the new wendigo bite/claw/scratching as the skinwalker is charging and the fae impales it. Then the wizard kills the wendigo.