Frightcrawler

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Threshold — As long as there are seven or more cards in your graveyard, this creature gets +2/+2 and can't block.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6oni65h5avpb1h5un91bh7.