Gadiel, Lord of Blood

Hexproof
When Gadiel, Lord of Blood enters the battlefield, create two blood tokens. If you don't control a creature named "Midnight, Mystic Familiar," create Midnight, Mystic Familiar, 1/1 legendary black Cat creature token with hexproof, flying, and "You have no maximum handsize."
Blood tokens you control have "{t}, sacrifice this artifact: Add one mana of any color to your mana
pool."