Sources for Dread Tusker

Imperial knight weapon axe (http://www.thingiverse.com/thing:2610665)
Power Armor Redesign for better print (http://www.thingiverse.com/thing:2543066)
Woolly Mammoth Skull  (http://www.thingiverse.com/thing:366151)
Valknut (http://www.thingiverse.com/thing:1843618)
Abstract wolf head, 2D extrusion, useful to stamp on other 3D objects (http://www.thingiverse.com/thing:423326)
