Against the Ragnarok Heralds.

A loud screeching sound cut through the skies of Somali where the fight against Niddhog was taking place. So far none the Valkyries have suffered any major injuries. Though the serpentine like dragon had the largest army following in its tracks, most of it has been eliminated with only a few having slipped through.

Only the Ragnarok Herald was left and the battle entered its second phase. In terms of power Niddhog wasn't the most powerful enemy humanity had face. Of course it's still an S class Calamity so the destruction it could bring was devastating, however according to the data collected by the Resistance the dragon should be the easiest Herald for the Valkyries to take down.

If that really was the case, why did they wait until now to do after it?

The dragon twisted its long body as it dove down. Letting gravity and momentum do the work it wrapped its wings around its upper half then started spinning as it headed for a group of five Valkyries.