Luciana, Occult Investigator

When Luciana, Occult Investigator or a creature
you don't control enters the battlefield,
investigate. (Put a Colorless clue artifact token
onto the battlefield with "{2}, sacrifice this
artifact: Draw a card.")
{1}{b}: Luciana, Occult Investigator gains menace
until the end of turn.
{w}{b}, Sacrifice {x} Clues: Destroy target creature
with mana value {x} or less.