Carve and Spit

Pros:
Restores mana
Has high potency when used in conjunction with Dark Arts
Off global cooldown
Sweet visuals

Cons:
The amount of mana returned is abysmal for a 1 min cooldown. It returns roughly around 860 to 900 mana
Base potency is 100 potency
It takes 1700+ mana to DA+C&S