Superior Espionage

: When Superior Espionage enters the battlefield, investigate 5 times, and until the end of the turn you may sacrifice Clue tokens without paying mana.
Whenever another player casts a creature spell, you may put a creature token onto the battlefield that is a copy of that creature, except it loses all abilities and has power and toughness 3/X, where X is the toughness of the copied creature.