David, Mage of Strange

Once during your turn, you may sacrifice two
clue tokens. If you do, search your library for a
card with friends forever and put it into your
hand.
Whenever you sacrifice a clue token, choose one.
You cannot choose the same one more than once
each turn. • You gain a life for each clue token
you sacrificed this turn. OR • Put a number of
+1/+1 counters on target creature for each clue
token you sacrificed this turn.