So what card effects can Darth Vader can really stop your opponents from playing? 

Definitely stops all Triggered abilities (Actions, Reactions, Interrupts).  Also stops Fate Cards.  Waiting for official clarification on exact interactions with constant abilities and keywords.

yeah it doesn't seem like it would stop constant effects like the crows or either of the yodas abilities for instance.

Official answer should réflection FAQ 4.5

Card Effects
A Card Effect is any effect that comes from the resolution of text printed on a card.
Card effects can be preceded by a triggering condition and/or a cost. Triggering conditions and costs are not considered effects.

And that would mean every effect from any printed text (triggered abilities, constant effect, keywords)

No protect on Vader's run. No targeted strike on Vader's block

Official answer should réflection FAQ 4.5 Card Effects A Card Effect is any effect that comes from the resolution of text printed on a card. Card effects can be preceded by a triggering condition and/or a cost. Triggering conditions and costs are not considered effects. And that would mean every effect from any printed text (triggered abilities, constant effect, keywords)

Yeah I'm pretty sure (not %100 sure) that's wrong. Constant effects don't initiate, nor do they resolve, so I'm not sure why you read 4.5 and get that outcome about constant effects from that. I don't even know if keywords are effected by this. I, at least, can see an argument made for that one though.

Some constant effects initiate... if they have a starting point.  Example: Leia's capture effect.  You'd be right about the Crow or any of the Yoda's though, those are definitely not initiating during the engagement.

So does shielding initiate?

Edit: How about protect and targeted strike?

So does shielding initiate? Edit: How about protect and targeted strike?

No to all 3. Vader blocks all of those.  Edge, on the other hand, does not initiate. It's always on, but just doesn't matter except for when calculating edge battle winners.

So you mean it works right? Vader on the attack, i defend with ewok and it gets its shield?

 

Just in case:p

So you mean it works right? Vader on the attack, i defend with ewok and it gets its shield?

 

Just in case:p

I misread question as does Vader stop those, not do they work... sorry.  Answer has been edited to reflect correct answer.

 

Vader prevents shielding, targeted strike, and protect from working while he is participating in an engagement.

Quick clarification - shielding initiates when the unit is declared. So while you can't shield in an engagement with Vader, you will be able to shield when declaring an attack, since Vader would join as a defender after you've already declared your attacking units and placed shield tokens.

Out of ruling coment, anybody finds it funny that in the movie vader gets bumbed by a supporting fire while he is supposed to block that effect ?

Quick clarification - shielding initiates when the unit is declared. So while you can't shield in an engagement with Vader, you will be able to shield when declaring an attack, since Vader would join as a defender after you've already declared your attacking units and placed shield tokens.

That is how I understand it, because Shielding resolves before defenders are declared and therefore before Vader is a participating unit.

So darth vader pilot stops shielding, protect, targeted strike. does it stop event cards and fate cards? also how about enhancements on units? 

So darth vader pilot stops shielding, protect, targeted strike. does it stop event cards and fate cards? also how about enhancements on units?

Stops all event cards and all fate cards. Stops triggered abilities on enhancements, but not constant abilities as those don't initiate.

Stops all event cards and all fate cards. Stops triggered abilities on enhancements, but not constant abilities as those don't initiate.

Nothing in the "I'll take them myself" newsletter mentions fate cards being cancelled. Only event cards and triggered effects were specifically mentioned. After it is like the tutorial said; "You cannot escape your destiny."

There was an official FFG ruling that said fate card effects are cancelled by Vader, but any icons would still count for the edge battle.  Can't link for some reason but it's in the official ruling thread.

Nothing in the "I'll take them myself" newsletter mentions fate cards being cancelled. Only event cards and triggered effects were specifically mentioned. After it is like the tutorial said; "You cannot escape your destiny."

Also, the release articles are useful but not exhaustive explanations of rules (and occasionally inaccurate... you can ask the X-Wing players how often their release articles contain some sort of mistake and have to get fixed.

There was an official FFG ruling that said fate card effects are cancelled by Vader, but any icons would still count for the edge battle.  Can't link for some reason but it's in the official ruling thread.

Thanks for the tip, I copied the post I believe you were refering to, (page nine of the thread):

 

 

Rules Question:
How does the new Darth Vader (Pilot (2) (While enhanced unit is participating in an engagement, an opponent cannot initiate card effects)) interact with 1. Passive Card Text 2. Keywords (including targeted strike, edge etc) 3. Fate Cards including twist of fate Basically does Vader stop all of those things?

Hi Stephen,

Does pilot Vader (set 159) stop Ewoks from gaining white blasts from the Warriors of the Forest objective if he is piloting a ship?

Warriors of the Forest is a constant effect that doesn't initiate, so no, pilot Vader does nothing against that.

No. Warriors of the Forest is a constant passive ability; it gives Ewoks edge-enabled blast at all times rather than waiting until a specific time (e.g., when they are declared as attackers).

Rulings

http://www.cardgamed...-only/?p=184747

 

http://www.cardgamed...-only/?p=184900

 

http://www.cardgamed...-only/?p=193466

 

http://www.cardgamed...-only/?p=205994

 

http://www.cardgamed...-only/?p=272729

 

http://www.cardgamed...er-interaction/