You can find the Soul of the Aspects on the Blizzard store. A lot of people thought that this Pet might have been the reward for the guild when they complete their 1st set of Legendary Daggers for their rogue.

lvl1 Claw
lvl2 Sunlight
lvl4 Surge of Light
lvl10 Breath
lvl15 Reflection
lvl20 Solar Beam

I recommend matching the Soul of the Aspects with other healers Pets. Sunlight affects the heals from other Pets. Surge of Light is also great when Fighting Pets that can cast Call Darkness.