Johnny Blaze, Ghost Rider

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Penance Stare {4}{b/r} (Target creature that dealt damage to you this turn, deals damage to itself equal
to its power.)
Ghost Rider's power and toughness are each equal to the number of black mana symbols in
the mana costs of cards in the battlefield and in all graveyards.