They don't like potatoes

Black clouds loomed over the horizon.

Those clouds were not only huge, but also intimidating. One could see a few beasts going in and out, their bodies were like mix of eagles and pelikans though. Their huge mouths were releasing similar black clouds filled with lightning.

Those beasts were pure beasts. Although they had intelligence, human form was impossible for them, thus, they weren't even considered a race. 

Still, they had a lot of importance for students here.

Their black clouds held a lot of pure lightning that could assist them.

However, due to their wild nature, it was hard to tame those and only the luckiest one had pure relationship with those beasts.