"Looks good, but maybe a little young, don't you think?" Dar grinned and moved behind Brian, wrapping his arm around the smaller boy's chest. "I mean, you could still work OK, but you'd miss out on a lot of fun."
Brian frowned, but did not pull away. "I work fine and I'm not..." He stared at the reflection, which was changing. At least, his reflection was. Dar still looked exactly the same, but now the younger brother shown on the pond's surface was maturing. The child got taller, passing through early puberty, and filling out as adolescence bloomed. When the image was once again steady, Dar's reflection was shown embracing an identical twin. The boy dropped his hands down and tugged Brian's loincloth loose, then let it fall to the ground. The twin had enormous sexual equipment, oddly dark and shaped. Brian realized it was very equine in appearance.
"There. Much better." Dar hugged Brian tighter, and the elf felt a growing hardness pressing against his rump. His altered reflection was also becoming erect. Dirty hands slid over his chest and arms, dropping down to curl around the thickening shaft. Dar's reflection began to slide his twin's thick foreskin back and forth, and Brian sucked in breath as he felt sensations way more intensely than he had ever experienced before.
"What do you say, Brian?" Dar licked the back of one of Brian's ears. "Want to join me working for the Wizard? It's a lot of work sometimes, but I have a lot of fun. It's not just sex. Join me and you'll get real magic of your own. And you'll be immune from anything your Tye wants to try. Become my twin brother and I'll share it all with you."