Calculating Confidant

Sagejutsu (At the beginning of combat on your turn,
this creature gets +1/+1 for each card type among
cards in your graveyard. If there are 4 or more card
types among cards in your graveyard put a +1/+1
counter on this creature.)
{w}{b}, Sacrifice a creature: Return a creature with converted mana cost less than or equal to the sacrificed creature's converted mana cost from
your graveyard to the battlefield.