Bontu, Midnight Hunter

Fear, Menace
Bontu, Midnight Hunter's toughness is equals to the number of creatures in your Graveyard. If you don't have any creatures there, its toughness is 0.
{t}, {b}, Sacrifice a creature: You gain 3 life.
As long as you have 5 or more creatures in your Graveyard, this card has Indestructible.