Nebuchadnezzar's Wrath

The Nebuchadnezzar's Wrath was a legendary axe said to belong to Nebuchadnezzar II, a king of Babylon who used it to execute his enemies. By the 1st century BCE, the axe ended up in Egypt and was recovered by the Medjay Bayek of Siwa.

Reference

 * Assassin's Creed: Origins