Forum:Help With Stardust Dragon and Red Dragon Archfiend

Help With Stardust Dragon and Red Dragon Archfiend

1)If I use the effect of Stardust in my opponents turn (because its speed 2), in which end phase can I special summon by its effect, in the opponents end phase ore in my end Phase?

2)If Red Dragon Archfiend attacks a face down Newdoria and Red Dragon Archfiend is destroyed by the effect of Newdoria, its effect still activate and destroy the others monsters in defense position of my opponent

Thanks