Forum:D.d. crow use

Can I activate D.D. Crow whenever I want. Like I wanna not hold the card in my hand so I just wanna activate it to remove anything out of my opponent's graveyard just so I'm not holding onto the cards. Do I have to chain it to something or can I just use it? Thanks. 137.104.82.90 (talk) 14:38, October 19, 2010 (UTC)