Mina nodded a bit. The penetrating smell was a simply recognizable animalistic body odor. The sound of a heartbeat reached both their ears and Mina paused. Whatever this thing was, it was massive. 
Cassius' transformation shone a light on the massive, lizard-like creature. It was larger than her, larger than her fox transformation, but about the same size of Cassius right now. Mina looked at the battle, but cursed. She wasn't helpless, certainly not now after she fed. She was in her element, multiple of her elements even. Pitch black rooms and blood of the beast covering the floor, it was her ultimate playingfield. 
She clapped her hands together and shadowy figures formed around her, created out of pure darkness and fed by the darkness surrounding them. 'I told you I wasn't helpless.' she stated coldly, before gesturing at the beast and sending the shadowy figures it's way. They latched on and shot through the beast like needles and thread, sowing a piece of fabric together.