Forum:Black rose dragon

when you synhcro a black rose dragon and you chain compulsory before your opponent activate black rose dragon effect to destroy all cards, my opponent can or can't activate black rose effect?

When this card is Synchro Summoned, you can destroy all cards on the field. Once per turn, you can remove from play 1 Plant-Type monster from your Graveyard to change 1 Defense Position monster your opponent controls to face-up Attack Position, and reduce its ATK to 0 until the End Phase.