Carnage Interpreter

{1}{B/R}{B/R} · Creature — Devil Detective · from $2.85

When this creature enters, discard your hand, then investigate four times. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

As long as you have one or fewer cards in hand, this creature gets +2/+2 and has menace.