Model: Arthas with new Anims --> arthas.mdl
Animation: Stand Ready
Arthas shakes up/down during stand ready animation, RDZ said it had something to do with bone structure, but i think its just the root bone being messed up.
I have searched a lot for animations with units attacking with right hand, found only 2-3 models that were transfarable, and only animations from 2 models were used because they didnt look wierd. So suggestions for a substitute animations work as well, ofc if you found one in the mpq it probably won't work cause i tested most.