Blessing of the Ziz

you call on the power of the Ziz and as you hear a great bird call from above all creatures of your choosing within range gain the following two benefits    

Spectral wing manifest on their back giving them a flying speed of 30ft, if they already have a fling speed it increases by 20ft

they gain temporary hit points equal to [roll]12d6[/roll] as feathers coat body 

additionally when they reduce a creature to 0 hit points they can let out their own bird call one creature within 30ft of the caller must make a wisdom saving trow or become frightening of the caller, a creature under the effect of this spell can call a number of times equal to your spell attack mod