What does Jeremiah 49:19 mean?

Look, someone will come up against Edom like a lion from the thick brush near the Jordan, attacking the safe pastures. In an instant, I’ll chase Edom from their land, and I’ll pick the leader I want. Who is like me? Who can challenge me? What ruler can stand against me? Jeremiah 49:19 - Modern Text Bible

(God compares the coming attack to a lion ambushing sheep, showing how sudden and unstoppable it will be. God alone decides who rules.)