Looks just like an Air-FalconPunch after the winged jump.
And great! Now I know how to get that trial done. 
(when I play, Zobek always ends up killing a ghoul)
Eh, it's not that hard. Just don't attack any ghouls unless you plan on killing them. Zobek's a wuss, so he'll take forever to kill anything.
That said,I think I got it.
He does Y, A, Avalanche (the shooting one) Punch, Holy Water. And I would guess with Forward held so he'll move forward the whole time.