Euthyphro dilemma

[Edwardo Piet]

The first horn "is something good because the gods will it" or
The second horn "do the gods will it because it is good?” but now
The third option (that has no unwanted conclusion): it is not God's will that defines the good but his unchanging nature that governs his will and his commands to us.

You misrepresent the first and second options when you pretend they're only about specifically God's will... so your third option can present itself as "No the answer is it's God's something else."

You clearly do not understand the dilemma at all.

It doesn't matter whether it's God's will, God's nature, or God's whatever. The point is: "Is goodness entirely reducible to God or is God entirely reducible to goodness?" If God is truly good then you don't need God, all you need is goodness. But if goodness only means whatever is akin to God... then this makes goodness meaningless... and God not even good.