Defy the goblin chieftain

You defy the goblin chieftain. The guards enter the room but do not interfere. Cheers erupt, drums begin to pound, a new challenger arrives!

You fight with all your strength, and the goblin chieftain is a skilled fighter, but he's no match for your strength and he falls on the floor covered in blood.

His wounds are deep, and he asks for help, but the goblins don't move.
Then, you take the crown and say.

"I'm the winner, the chieftain is dead, but I don't want the crown, just show me your treasure and give me more information about the magic stones."

The shaman speaks and tells you about a dragon egg, and the legend of the stone in the Green Mountains.

He show you the egg, and you give him the crown in exchange fo safe passage and the egg. They can keep the gold and the tribe.

The shaman bows, and the entire tribe accepts your conditions.

After hours of travel, you finally arrive at the Green Mountains.
These majestic mountains rise like stone giants, their peaks reaching the clouds. Carved into the mountainside, you notice a cave with a dragon head carved in the stone. This place is filled with ancient power and magic.

You did it, the stone is close, very close, and your map starts to glow.
At this moment, you have a few options.

You can enter the cave with stealth.
Or... You have the egg, you can try to persuade the dragon to give you the stone.
Both options have their risks.

What do you do?