It's strange, it's not like anything we've faced before,
Yet seems familiar somehow.

Of course...

The spell we cast with Buffy
Must have released some primal evil
 [bad word] back seeking...
I'm not sure what.
Willow, look through the Chronicles
for some reference to a warrior beast

I've got to warn Buffy,
There's every chance she might be next
Xander, help Willow
And try not to bleed on my couch, I just had it steam-cleaned.

No, wait...