Verloina, Phantom of Irg'Dul

Verloina is unblockable.
Whenever Verloina deals combat damage to a player, surveil 1.
Whenever one or more creatures are put into your graveyard from your library, create an X/X blue and black Dracolich creature token with flying and "This creature's power and toughness are both equal to the number of creatures in your graveyard."