Batman, Gotham's Protector

Menace, Skulk
Secret Identity (At the beginning of each upkeep, if a Clue was sacrificed last turn, Transform Batman.)
Batarang- Remove X +1/+1 counters from Batman, {ut}: Batman deals X damage to any target.
Activate only once each turn.
Whenever Batman deals combat damage Investigate that many times.
Sacrifice two Clues: Tap target creature, put a -1/-1 counter on target creature, or transform Batman.