When you buy or find a bottled faerie, you can set it free -- in return, the faerie can bless your pet with special abilities. You can access your pet's abilities page here. You can see some of the available abilities here.
The most common types of faeries you'll run across and the abilities they will grant are:
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Air Faerie - grants abilities from the sphere of air - powers such as invisibility, haste or flight.
Earth Faerie - grants powers such as toughened skin, the ability to magically create food or burrow into the ground.
Fire Faerie - grants many battle magics.
Water Faerie - grants healing and defensive powers that will protect your pet from harm.
Light Faerie - grants holy powers such as bless and restore.
Dark Faerie - grants evil abilities include creating darkness, draining life and vision at night.
