Dr. Hannigan's Grand Hunting Expedition

[Annabeth]

Noticing the nod from Olla, Annabeth began letting her fingers work. She made a clear frame of a cloud to start, then filled the exterior of the shell with a shifting rainbow of colors. Some sections had packed bright colors, others dark, and still more were a mixture. Before she put on the top, she reached inside and began making seemingly random, to those not familiar with the patterns of lightning, streaks of crystals. Satisfied, she held it towards Olla and used a little of her own electricity to dance through the crystal streaks from a couple contact points on the bottom.

The cloud flickered and flared, every section getting its turn. And when held without using electricity, the crystals gave a light scattering effect similar to a cut gemstone when you looked at turned it in the light.