Hello, can somebody explain this ability by explaining each line below?

http://postimage.org/
Like what is this autocast requirement? What does it stand for, what does it represent?
And water height? What the hell?
Hit points and mana points gained per how much? How much does the moonwell lose per restore of certain unit's mana/health?

http://postimage.org/
Like what is this autocast requirement? What does it stand for, what does it represent?
And water height? What the hell?
Hit points and mana points gained per how much? How much does the moonwell lose per restore of certain unit's mana/health?