Forum:Attacking ryko

Need help with a question regarding attacking face-down monsters with flip effect. when attacking a face-down monster like Ryko/lightsworn and it destroys the the attacking monster with it's affect, does Ryko still live.. same question with Grave-keeper's Guard when face-down. and it is attacked by a monster with a higher attack then its defense, can guard bounce the opponents monster back to hand and does Gaurd live.

thanks for your help.. Dj