L, Secret Operative

When L enters the battlefield, you may pay
any amount of white mana. If you do, create
that many clue tokens.
Sacrifice a clue: Tap target creature.
Sacrifice three clues: Draw a card.
Sacrifice five clues: Exile target permanent.
"Hrrmm... Yes, this is a conundrum.... It's a
good thing I'm smarter than all of you."
-- L