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For some reason a lot of people in my meta cant seem to agree on whether this is ok or not.

I have a face up diamond dude and i activate his effect sending cold wave from the top of my deck to the grave. Next turn I go about my main phase and last thing I do before entering the battle phase is to decide to activate the effect of cold wave.

Some think its perfectly fine while others seem to think it cant be done. Can this be clarified please.

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the rulings i have always been told is that cold wave must be the fisrt cards you play. you cannot activate it if you have activated or set any m/t cards and you cannot activate it in the manner your speaking of buy my reckoning. if i am wron on this however i will gladley apologise.

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London, UK

Specializations:
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Rules Knowledge - Yu-gi-oh!: Level 1
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Cold Wave:

This card can only be activated at the start of your Main phase 1. Until your next turn, neither player can activate or Set Spell or Trap Cards, or activate their effects.

If you send "Cold Wave" to the graveyard with Diamond Dude's effect then next turn you will have to either active Cold Wave from the grave before doing anything else or forfeit it entirely.

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LVL 1 YGO RK
LVL 1 PM
Friday night custom games on Halo 3 hosted by my bro on Xbox Live. Gamertag: Ju_Jitsu_X

thought as much

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London, UK

Specializations:
Player Management: Level 1
Rules Knowledge - Yu-gi-oh!: Level 1
Tournament Organizer: Level 1

I'm sorry, but I'm going to have to go against Evan's ruling on this.

It specifically says "This Card".  You are not "activating" the Card (hence why Magic Jammer and Magic Drain cannot be activated).  You can activate the effect of Cold Wave anytime during the main phase(s) of your next turn after Diamond Dude ditchs it.

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107-744-616
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Edit: Disregard.

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LVL 1 YGO RK
LVL 1 PM
Friday night custom games on Halo 3 hosted by my bro on Xbox Live. Gamertag: Ju_Jitsu_X

And I would have to say Johnist is wrong here.

Curse of Fiend
Normal Spell

Change the battle positions of all Attack Position monsters on the field to Defense Position and vice-versa. These positions cannot be changed during the turn this card is activated except by the effect of a Spell, Trap or Effect Monster Card. You can only activate this card during your Standby Phase.

Note the "this card" in the bolded section.  Now, let's move onto Diamond Dude's ruling.

• [Re: Destiny Hero - Diamond Dude] You cannot activate the effect of "Curse of Fiend", because it can only be activated during the Standby Phase.

Apparently the phase timing does matter and the "this card" text does not change that fact.  So I would agree with the initial assessment.  It would have to be the very first thing you resolve in your Main Phase 1.

So technically the keyword here is "activated?"

Sorry to bring up an old topic, but are you sure about that analysis, Ryou?  I mean, Curse of Fiend's restriction is clearly part of the effect text while Cold Wave's restriction could easily be interpreted as an activation requirement which Diamond Dude would be able to get past

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JD DeKeyzer
-YGO R&K LV2
-PM LV1
-TO LV1
-inventor of the world's first Duel System (Duel Terminal's a cheap knock-off of this, I swear)

How's Curse of Fiend's restriction clearly part of the effect? In fact, it's clearly not part of the effect since it doesn't do anything but state when you can a activate it. If that isn't clear, how can an effect prevent you from activating a card when you use the effect is must be activated in the first place?

Cold Wave's requirement is not an activation requirement, like Dark Magic Attack requiring a Dark Magician on the field, but a timing condition that says at which point in the game it can be activated. Diamond Dude can bypass the first but not the latter.

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Level 1 YGO Judge
Level 1 Player Management
Level 1 Tournament Organizer

http://entertainment.upperdeck.com/community/forums/post/1321840.aspx

skey:

I'm in agreement with Tsui

So your technically not activating the card, just the effect. Diamond dude just activates the effect. Since he already paid the cost (activating which isn't the same thing as using) and just use the effect? So timing as far as anything past Main Phases would still be able to work with Diamond Dude unless the effect needs to be used on the Standby Phase.

Pixel: Re-read what I posted earlier.  The one thing that the rulings make clear is that Diamond Dude's effect cannot override a specific timing requirements.  And by timing I'm referring to Specific Phases or Moments in the Phase.

1757374:

How's Curse of Fiend's restriction clearly part of the effect?

Because of the fact that activation requirements are the first thing stated on a card's effect text, like discarding a card or paying X amount of life points.  The fact that it's the last thing mentioned on the card implies it's part of the effect.  Meanwhile, Cold Wave's effect text implies that it being the first thing you must do in your Main Phase 1 is an activation requirement, which Diamond Dude supercedes.

The argument is whether or not Cold Wave's first sentence is an activation requirement...nowhere in the rulings does it say Diamond Dude cannot override timing requirements; the Curse of Fiend ruling can easily be interpretted as its timing requirement is part of the effect, which easily explains why Diamond Dude doesn't allow its effect to activate

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JD DeKeyzer
-YGO R&K LV2
-PM LV1
-TO LV1
-inventor of the world's first Duel System (Duel Terminal's a cheap knock-off of this, I swear)

Curse of Fiend was printed a long time ago when confusing card text roamed free so making rulings from its card text is not recommended.

Again, activation and timing requirements can't be part of the effect since it absolutely makes no sense of something that applies to before the effect resolves in the effect. It's like a card with an effect "you can't activate this card". To get the effect "you can't activate this card", you must first activate the card. I hope you can see the problem with this.

Thus Curse of Fiend's last sentence is a timing requirement and Diamond Dude not being able to bypass timing requirements follows from that ruling.

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Level 1 YGO Judge
Level 1 Player Management
Level 1 Tournament Organizer

http://entertainment.upperdeck.com/community/forums/post/1321840.aspx

skey:

I'm in agreement with Tsui

1757374:

Curse of Fiend was printed a long time ago when confusing card text roamed free so making rulings from its card text is not recommended.

Even back in the day of confusing card text, costs and activation requirements were ALWAYS the first thing listed on the card.  Either Curse of Fiend is the one abnormality of that time period with the activation requirement being the last thing listed, or it's actually part of its effect which explains the Diamond Dude ruling.

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JD DeKeyzer
-YGO R&K LV2
-PM LV1
-TO LV1
-inventor of the world's first Duel System (Duel Terminal's a cheap knock-off of this, I swear)