She is called asaṅkhyakālikātulyā - comparable to the energy of countless Kālī-s put together… One can only imagine that 
Kinda like a nuclear bomb haha
There is an interesting anecdote about her that my teacher narrated. In the 90s, my teacher and his family lived in Kashmir, which has constantly suffered from Terrorism. This was the time when the Hindu Kashmiri Pandit Genocide occurred and Hindus were thrown out of their homes by Islamist Terrorists. Neighbors turned on their Hindu neighbors and started marking homes of Hindus for the Islamist mobs to attack, rape, plunder and kill. Loudspeakers from mosques began to announce: 'Asi gachi kasheer. Batav ross, batnyev saan". It literally means, “We want Kashmir. Without Hindu men, but with Hindu women.” Girls as young as five were raped and killed before the eyes of their parents. There were all kinds of horror where a Hindu man was killed and the radicals forced his wife to eat rice soaked in her husband’s blood.
When all this was going on, my teacher who was a student of the enlightened Kashmir Shaivite teacher Lakshman Joo began to invoke Pratyangira and miraculously, his entire block was saved and they were able to escape from Kashmir. He later narrated to me that he could literally feel her energy pushing away, immobilizing and confusing the mob which was banging on their doors and trying to break in. He also confided that he could have saved a larger group of people if he had more time to evoke a greater field of Her energy. He passed a few years ago and his granddaughter told me that before he passed, he said, “Look, Pratyangira stands there to take me to my next abode”… She could see a flash of red light for a bit and he passed. Pratyangira (Sekhmet) is hence also the guide to the next world/dimension/transition.