Pixiee, Innistrad Blossom

+1: Add one mana of any color. Until your next turn, prevent all damage dealt by up to one target creature. It attacks Pixiee each combat if able.
0: You gain 1 life and draw a card.
0: If Pixiee has 5 or more loyalty, you gain 20 life. Then, shuffle Pixiee into its owner's library.