"Alright then." Obsidian answered.
Raising her staff toward the moon, she began to channel moonlight from it until it filled the crystal on top of her staff with a bright, swirling, mystical light, more vivid than it was normally. Once she gathered enough light she directed the magic into her right hand, where it began to take the shape of a glowing bluish silver ball of moonlight. Suspended in the air just above her palm, the moon elf made the orb grow in size but still retained a pale soft glow about it, just like that of moonbeams. Then all of a sudden, she released the ball of moonlight and it burst into tiny sparks of light, that were positioned around them like tiny stars glittering in the air. Meanwhile the light from the moon itself shone down upon them in beams of soft grey, illuminating everything in a pale ethereal wonderland.
With a wave of her staff, Obsidian dispersed the energy and it retreated back to where it came from. Waving her staff again, the lunar mage made the shadows from the night grow thick and dense around her making her seemingly disappear from the other mage's sight. They coalesced around her like a black cloak before melding into the environment itself to the point where Obsidian was no longer visible.
Then in just one more second she reappeared again, holding her staff proudly. "There you have it, a simple demonstration of my moon magic. I am able to do some limited dream magic as well, but that is obviously more tricky to show." she smiled.