Desjardins: Apophis, I name you Lord of Chaos, Serpent in the Dark, the Fear of the Twelve Houses, The Hated One. I speak for the gods. I speak for the House of Life. I am a servant of Ma'at. I cast you underfoot. I erase your name. I erase you from the memory of Egypt.
Walt and Anubis show what happens to anybody who threatens Sadie Kane - it's not pretty but it is awesome.
Possibly the most awesome Badass Boast of the entire series belongs to Zia Rashid, when hosting the spirit of Khepri.
Zia/Khepri: I am Khepri, the rising sun. I will not be denied.