Clue Maker

Cards that produce Clue tokens via the investigate keyword or direct token creation. Clues are colorless artifacts with "2, Sacrifice this artifact: Draw a card." Tireless Tracker investigates on landfall, Thraben Inspector investigates on ETB, Bygone Bishop investigates when casting cheap creatures, and Confirm Suspicions investigates three times while countering a spell. Distinct from tokens.treasure_maker and tokens.food_maker, which produce different artifact token types with mana or lifegain payoffs rather than card draw. Distinct from tokens.creature_token_maker since Clues are noncreature artifact tokens. Cards that only sacrifice Clues without creating them are not covered here.