Tesla and Bella, The Budgies

Flying, double strike
Link: This creature's toughness is equal to your life total + 2. Your life total is equal to this creature's toughness.
Whenever you draw a card except if it came from any ability of this creature, draw a card and attach it to this creature face down. Prevent all events that could happen because of this ability. All costs on the attached cards are {w/u}.
Whenever you cast a card except if you do so because of this creature, randomly choose a card attached to this one, you