Mapmaker's Study

When Mapmaker's Study enters the battlefield,
untap target creature. That creature gains
vigilance and haste until end of turn.
Whenever a Scout creature enters the battlefield
under your control, you may pay {2}, if you do, investigate. (Create a colorless Clue artifact token
with "{2}, Sacrifice this artifact: Draw a card.")
"Mapping is fundamental to the process of lending
order to the world." — Robert Rundstrum