Forum:Can Vanguard of the Dragon's Effect be used by my opponent?

What the question says^^ But to give a scenario Player A's Vanguard of the dragon changes control to Player B. Player A then uses Dark Hole to destroy all monsters on the field. There is a normal dragon in the graveyard. Is Player A or Player B the one that is able to use Vanguard of the Dragon's second effect to special summon a normal dragon from either graveyard? "When this card you control is sent to the Graveyard by your opponent's card effect, you can Special Summon 1 Dragon-Type Normal Monster from either player's Graveyard." Just want some clarification. --75.33.54.117 (talk) 06:31, September 17, 2010 (UTC)Anonymous Duelist