This will probably happen to few players. Mainly cause people are sidedecking D.D. Crow against Dark World, and Dark World these days are packing DDV. Anyway, onto the question.
#1: Your foe activates DDV. You have D.D. Crow in your hand. To the responce to DDV, you can chain to it and activate D.D. Crow from your hand to RPF whatever card you can from your foe's grave right? (Since your gunna lose D.D. Crow anyway)
IMO, the answer is yes.
#2: DDV was activated and it's effect is still lingering. You topdeck D.D. Crow during your draw phase. Can you immediately activate D.D. Crow to RPF something out of your foe's graveyard. (Since your gunna lose it anyway)
IMO, again, the answer is yes.
From what I see, D.D. Crow can be activated anytime but the damage step. (So no D.D. Crow during when you attack a Morphing Jar face-down.) In situations like D.D. Crow vs Card Destruction. You can decide not to chain to Card Destruction, and then D.D. Crow will not activate and will count towards how much cards you draw, (And if your foe discards Dark World by Card Destruction, you missed your timing since they discard after when it resolves) or you can discard D.D. Crow, remove something (e.g. maybe Treeborn Frog) and it will not count towards Card Destruction effect of how much you draw. Similar situation when it's D.D. Crow vs Morphing Jar, and your foe flip summons their set Morphing Jar (D.D. Crow can activate since it's not during damage step, although it'll again miss it's timing of RFP any Dark World monsters.)
D.D Crow vs Dark World Dealing.
Both effect must resolve first, meaning both players must draw and then discard. THEN after your foe discards Dark World AND you discarded something else, THEN you can immediately discard D.D. Crow to RFP that Dark World monster in order to stop the effect. (usually a Goldd/Sillva) I think this is how it's suppose to work. (And thus overall, you discard 2 cards. One card for Dark World Dealing, and then D.D. Crow when Dark World hits the grave on your foe)
#1: Your foe activates DDV. You have D.D. Crow in your hand. To the responce to DDV, you can chain to it and activate D.D. Crow from your hand to RPF whatever card you can from your foe's grave right? (Since your gunna lose D.D. Crow anyway)
IMO, the answer is yes.
#2: DDV was activated and it's effect is still lingering. You topdeck D.D. Crow during your draw phase. Can you immediately activate D.D. Crow to RPF something out of your foe's graveyard. (Since your gunna lose it anyway)
IMO, again, the answer is yes.
From what I see, D.D. Crow can be activated anytime but the damage step. (So no D.D. Crow during when you attack a Morphing Jar face-down.) In situations like D.D. Crow vs Card Destruction. You can decide not to chain to Card Destruction, and then D.D. Crow will not activate and will count towards how much cards you draw, (And if your foe discards Dark World by Card Destruction, you missed your timing since they discard after when it resolves) or you can discard D.D. Crow, remove something (e.g. maybe Treeborn Frog) and it will not count towards Card Destruction effect of how much you draw. Similar situation when it's D.D. Crow vs Morphing Jar, and your foe flip summons their set Morphing Jar (D.D. Crow can activate since it's not during damage step, although it'll again miss it's timing of RFP any Dark World monsters.)
D.D Crow vs Dark World Dealing.
Both effect must resolve first, meaning both players must draw and then discard. THEN after your foe discards Dark World AND you discarded something else, THEN you can immediately discard D.D. Crow to RFP that Dark World monster in order to stop the effect. (usually a Goldd/Sillva) I think this is how it's suppose to work. (And thus overall, you discard 2 cards. One card for Dark World Dealing, and then D.D. Crow when Dark World hits the grave on your foe)