Agree to help him

The dragon's claw traces a sigil in the air and a surge of energy courses through your body. He cast a polymorph spell, your hair lengthens into golden strands, your skin smooths, and your ears change to become ponty and with a perfect shape.
The dragon is satisfied. "Now you wear the face and body of the Elf Queen, but is not enough, they will know that it's a trick"

The dragon calls his slaves, and a group of humans comes to help you. They draw you in silken robes and perfumes. For many days, they train you in royal gestures, and the final step is the magic potion a vial of silvery liquid that burns your throat as you swallow.

"Now speak" the dragon commands.

You open your mouth, and the voice that emerges is not your own, it is melodic, laced with power and you speak a perfect elvish "I am the Elf Queen" you declare.

The dragon's eyes gleam. "Good. The goblins stole my egg, believing it a jewel. I can trick them with your help"
When they arrive at the glade, you have to move forward and say "I am the elf queen", don't say any other word, and my guards will do the rest when they have the egg in their hands. I cannot join you, the goblins will never accept to face me, they are not stupid, if I have the opportunity I will burn them to ashes and retrieve the egg.

You enter inside an elven carriage and you travel inside the forest of the goblins. The dragon’s guards are with you and after a few hours, you are in a glade. The goblins are waiting for the egg.
The guards give you a silent command and you know that it's time to make your move.
You raise your chin, and the potion’s magic gives you a powerful melodic voice: "I am the Elf Queen." you say.

The goblins murmur, they don't detect the dragon's smell on your body, and they think that you are the true queen, not one of his slaves.
They say "We accept! Goblins return… stolen jewel!" and one of them moves forward with the egg.

You think that the guard will exterminate the goblins once they have the egg, but suddenly you feel weak, you try to speak, but you can't... you are paralyzed.

The goblins take you, and you are transported inside their lair, they strip off your clothes and you are chained in their dungeon.
You can't speak and they think that you are the true elf queen. Every single day they **** you with their magic and **** you to eat their cum. Without your voice, you can't reveal the truth and you are **** and humiliated until they are tired or you faint.

This is your new life, after the dragon's betrayal... until one day you are humiliated and executed in front of the goblin village.

Bad ending
Fake elf queen ending