Forum:Destruction effects

If I control a Red Dragon Archfiend and it's effect activates in the end phase but there are no other monsters to destroy could my opponent tribute Stardust Dragon to negate and destroy it?

If I control a face up Six Samurai and my opponent special summons The Last Warrior from Another Planet and it's effect activates to destroy all other monsters he controls, if he has no other monsters could I still activate Musakani Magatama to negate and destroy it? --ME!!!!!!!!!! (talk • contribs) 20:37, September 26, 2011 (UTC)