A giant worm

Things were gradually getting better in Blackstone City as well.

Inside a meeting room built just behind the outer walls, the Horde's Alpha-level powerhouses were all grinning from ear to ear. Onyx had successfully summoned a blood spirit, and Thundar had captured a Dark Fiend, immediately adding two heavy hitters to the Horde's forces. 

By contrast, the Dark Creatures had just lost two of their top fighters. And with the Dark Armored Beetle now dead, the Dark Creatures no longer had the option of launching an underground assault. That took a massive load off the shoulders of those defending the city.

"Everyone, we couldn't have won without you," Delilah praised the elders, then straightened her expression and began issuing orders.

"Elder Thundar, take the cavalry and head for the underground fissure to assist Lorelia and Rockwell. There's a swarm of subterranean creatures crawling up from the bottomless abyss. One of them is Alpha-level.