Forum:Cost: Remove from Play

For a monster that requires that I remove from play specific monsters in my graveyard (IE: Chaos Sorcerer, Sky Scourge Enrise), can I simply declare that I want to remove said cards from play, or do I have to use another card's effect to remove them from play? (IE: Soul Release) Revanchist 13 13:38, April 29, 2010 (UTC)