Tireless Tracker [March of the Machine Commander]

Set: March of the Machine Commander Type: Creature — Human Scout Rarity: Rare Cost: {2}{G} 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 Tireless Tracker.