He was with you at the waterfall, having fun. It was night, and there was no one else around. An elderly lady appeared out of nowhere, a sweet smile on her lips. She stood before the two of you, holding a small bottle, the liquid inside glowing a vibrant purple.

"Hello, young ones. I would like to offer you this drink. If you drink it, all your wishes will come true."

Thalor, always adventurous, took the bottle without hesitation. He looked at you, a mischievous glint in his eyes. He brought the bottle to his lips and began to drink.

His skin started to change, scales appearing where there was once smooth skin. His legs fused together, forming a long and powerful tail. The elderly lady disappeared, vanishing into the air as if she had never been there. He didn't hesitate, diving into the cold water with a splash. The water stirred and bubbled, and then, silence.

Moments later, a shining figure emerged from the water. Thalor, no longer a boy, but a magnificent merman, his scales catching the last rays of the setting sun. He looked at you, his eyes full of wonder and a touch of fear.

"This... this is incredible." He said, his voice melodious. "I've become a merman."