It's coming...
But we can't just fire off a Demon-Breaking Arrow and evaporate them, because such a brilliant light illuminating the night sky would obviously attract a lot of attention. So we'll have to wait until they come down before taking action to eliminate them... Although it's a bit of a hassle, it won't take long.
...
...
At the same time, or rather at a different time.
Five hundred years ago, during the Warring States Era.
In the wilderness, a campfire is burning. It's nearly dawn, but Himura Kagome and the group aren't sleeping. Instead, they're sitting around the fire. The man in the red robe crosses his arms arrogantly and speaks harshly to the old man:
"Are you the swordsmith who forged the Iron Shattering Fang?"
"Yes, it was I, Todouji, who forged the Iron Shattering Fang from your father's tooth."
