Ruthless Tracker

Lands you control are Clue artifacts in addition
to their other types and have "{2}, Sacrifice this artifact: Draw a card."
Whenever Ruthless Tracker deals damage, it
explores. (Reveal the top card of your library. Put
that card into your hand if it's a land. Otherwise,
put a +1/+1 counter on this creature, then put the
card back or put it into your graveyard.)