Protoss Campain: Annilators

In the War Room selecting the Dark Templar Immortals (Annilators) they claim to shoot Ground and Air targets, but in game only shoot Ground targets

bra , if immortals , ( i recently bought the toss campaign lv 8 ) could shoot air , it be the only unit ya need .

Zeratul Enforcers (coop) agree and leave their business card.

Isn’t it referring to their ability?

It’s more like they are ABLE to shoot air targets; its their shadow cannon ability and you have to target air targets.