Persephone, Witch of Hellfire

As long as Persephone, Witch of Hellfire is on the battlefield, demons you control get +1/+1.
{t}, Draw 3 cards, then discard 3 cards, and deal
3 damage to any opponent.
Sacrifice a creature. Shuffle cards of your choice from your graveyard into your library based on its power:
• Power 2 or less one card
• Power 3 or greater two cards
• Power 5 or greater two cards and return one to your hand