1. After hours of effort, the technicians finally broke the back of the beast and turned the electricity back on again.
2. In business negotiations, delays and uncertainties are the nature of the beast, and one must be patient.
3. The CEO's aggressive tactics in the industry are the nature of the beast, but some employees find them unethical.
4. Interestingly enough, some species of dinosaur, from which birds hail, were ferociously toothed beasts.