Two hex attack used by dragons, or any other creature with "dragon breath" flag (commanders).
A "start moving" used when creature start moving =). Like Energy Elemental transform into plasma and then moving, or harpy soars up. And in "finish moving" harpy lands down. In any other creatures, without specific move animations, You can simple use first frame from move in "start moving". Thats all.
P.S.:Why and what your model crash?