Zoroastrianism is monotheistic. The the creator and sole God is Ahura Mazda.
What did you do to Ahriman?
>>>”Zoroastrianism is monotheistic. The the creator and sole God is Ahura Mazda.”
“What did you do to Ahriman?”<<<
For a serious answer: In terms of theology, Zoroastrianism is about eschatological monotheism, and cosmogonic dualism (Ahura Mazda and Ahriman, i.e. Goodness and Evil).
That means, Zoroastrians worship 1 God only (Ahura Mazda) - hence, monotheism. He is known as the creator of the world, as we know it.
Ahriman is the opposing force in the universe. Ahura Mazda did not “create” him, because Ahura Mazda is not capable of creating evil or doing evil.
Zoroastrians are taught that there is and will continue to be a battle between forces of Good and Evil, and Good will eventually & finally overcome Evil.
Zs, therefore, individually & collectively, are encouraged to think, say and do Good to tip the balance in favour of Ahura Mazda. Though, each person (individually) has a choice, and must choose (carefully) for themselves whether they want to follow Goodness or Evil. Their choice will have consequences.