Mo Fei soared through the sky, overlooking the Black Dragon Legion below where the black dragons were resting and recovering their strength. Dragonoid mages were opening portals, teleporting swaths of dragonoid soldiers over.
Priests of the Dragon Worship Cult were also lending a hand, summoning a large number of Ghost Dragons. These magical creations looked like dragon spectres and, although their killing power wasn't strong, they could incite mass terror—perfect for the chaos of battle.
Also teleported over were all sorts of monster minions: goblins, jackalweres, Bearkin, Boarfolk, Ogres, Tauren, Trolls... The Dragon Race usually didn't have strict standards when recruiting underlings, as long as they could fight and weren't afraid of death.
Most of the time, they just took what was available locally. In any case, they were all just cannon fodder.