Trail of Evidence

Whenever you cast an instant or sorcery
spell, investigate. (Put a colorless Clue
artifact token onto the battlefield with
"{2}, Sacrifice this artifact: Draw a card.")
"No. After school, you all go home. Immediately.
That means no biking around looking
for your friend, no investigating, no
nonsense. This isn't some Lord of
the Rings book." - Hopper