Bilbo, Unwilling Burglar

+2: Throw a rock: Bilbo deals 2 damage to target creature. If that creature would die, tap it and put a stun counter on it instead.
-1: Create Bilbo Baggins, a Legendary 1/2 white creature with ward 1, vigilance, and 2: put a +1/+1 counter on this creature.
-4: Bilbo Baggins gains hexproof, unblockable, and if this creature would be killed or exiled, return it to the battlefield. Activate this any time.