But when the Cat had followed in and had come out again in a madness of terror, then I said to myself, Surely the true Tash, whom they called on without knowledge or belief, has now come among us, and will avenge himself.
There are no more uses of "avenge" in the book.
Show samples from other sources
He wants to avenge the murder of his brother
You are the representative of justice here, and it is for justice to avenge those she has been unable to protect.