Go to the active volcano

You descend to the volcano’s mouth.
When you are inside, the ground trembles, you notice veins of molten rock. You haver to cast a spell to endure the heat and protect yourself.

Then something moves.
The mighty red dragon appears before you, his scales hard as iron and his eyes glowing like lava... "Tiny, stupid mortal" he roars with a malevolent smile "You entered my lair. Now I can kill you..."

You don't have time to waste, you can speak now or prepare to fight.
If you speak with him you can try to ask for the stone and avoid an impossible fight, but you don't know how this evil creature can react.