Flash

When Nott the Brave enters the battlefield, create a colorless Clue artifact token with "{2}, Sacrifice this artifact: Draw a card."

Whenever you sacrifice a Clue, you may pay {U/B}. If you do, create a 1/1 blue and black Rogue creature token with deathtouch.

{1}{U}{B}: Sacrifice a creature. You gain life equal to its toughness.