[ The Librarian watches with a mix of curiosity and revulsion as the man repeatedly skewers the shrieking monstrosity, to no avail. He had not been able to get a good sense of the creature when it had been shrieking and clawing at him from above, but now that it's under the man's spear, he can see clearly that the beast is roughly humanoid—a humanoid that has been rent in two. Below the ribs is nothing but a bloody stump, entrails dangling. ]

A powerful Heart principle, to be sure, [ the Librarian answers, fascinated despite himself. ] Possibly a servant of the Thunderskin, corrupted by Grail influences. Or perhaps the other way around...

[ Ravening thirst, forced to endure. Or else indefatigable endurance, forced to thirst. Either way, the Librarian cannot help but pity the creature. He begins to look around with urgency, searching the ground. ]

Its missing its lower half—if it were ambulatory, one would expect it to have joined the fray by now.

[ Which means, since it hasn't, perhaps it is still. Vulnerable. ]