Weasley, the Forrest Dancer

Whenever a land enters the battlefield under your control, investigate. (Put a colorless Clue artifact token onto the battlefield with "2, Sacrifice this artifact: Draw a card.")
Whenever you sacrifice a Clue, put a +1/+1 counter on Weasley, the Forrest Dancer.
If Weasley, the Forrest Dancer, has three counters, exile and return to the battlefield transformed.