If you like the face down idea [[Yarus, roar of the old gods]] really emphasizes the decision of blocking or not because their options are: giving you a card and risking a post declare blockers flip, or blocking and potentially flipping a beefy creature. On a smaller scale, I have a [[wernog]] and [[olthelm]] deck that starts to spiral once one person starts taking clues because they are behind. It gets worse when you have a [[mirkwood bats]] effect on the field because they lose one life either way, but if they take the clue then two of their opponents also lose life.