The Colossal Titan

Whenever The Colossal Titan enters the
battlefield or attacks, it deals 5 damage to target
opponent and 5 damage to each creature that
player controls.
Whenever The Colossal Titan is dealt damage,
instead prevent that damage and put a number
of -1/-1 counters on it equal to the damage
prevented. Then, if The Colossal Titan would
die this way, instead transform it into
Bertholdt Hoover.