Mother of Night

Captain - Mother of Night must be your commander. Your starting library can have any number of creatures named "Child of Night".

Mother of Night cost {1} less to cast for each creature you control named "Child of Night". If a creature you control named "Child of Night" dies, put it into the battlefield as an Enchantment (it is no longer a creature) with
"{t}: Add {b}. Spend this mana only to cast creatures with "of Night" in their name."

Lifelink, Flying