Mother of Night

If Mother of Night is your commander, your starting library cannot have any creature cards.

Eminence - While Mother of Night is in the command zone or on your field, Whenever you cast
a black instant or sorcery spell, create a 2/1 Black Vampire Creature Token named "Child of Night" with Lifelink and a converted mana cost of 2 that counts for one black devotion. ({1}{b} as a CMC)

Lifelink