[@Enki]

[i]The monster moved like a shadow on the wall at midnight. It leapt backwards as Nergal charged in, raising its left arm to block the blood slash with the immensely durable tissues of its wing. 

That probably wouldn't be the biggest surprise to Nergal, though. Were he to step foot in the slime that the creature had left where it had been, he'd stick fast with his momentum perhaps making him fall forwards, his hands and body potentially falling victim to the mucous as well. 
The monster had laid a trap of its own.

If Nergal did get stuck to the floor, the Magna Pater wouldn't immediately attack. Instead it would just remain several feet away, watching in the same way a young boy would perceive the thing in his closet watched. Unlike Nergal, it wanted to take its time. [/i]