No. A card cannot be activated, if it is unable to resolve.
Cards like Statue of the Wicked and Ojamagic, do not have a resolvable effect that can occur from activating them on the field. All their effects are triggers, which activate under other circumstances. Because nothing would resolve, they can't even be activated on the field. Ojamagic's effect only triggers after it leaves the field, so there'd still be no resolvable effect from trying to activate it on the field.
Such an effect, for example, the effect of "Dark Cat with White Tail", targets the monsters it will return. If there aren't enough valid targets, then the effect won't even activate. It is not legal to activate an effect if it can't resolve fully.This is different to legally activating an effect and then conditions changing before it resolves - that's handled on a card to card basis. In the above effect, if it was activated legally but something was chained that removed a target from the field, the effect will resolve as much as it can, returning the other targets to hand.
There is an important distinction between 'activating a spell/trap' and 'activating the effect of a spell/trap'. Light Barrier's activation was when it was placed face-up on the field, and this is the only time an activation negation card like Magic Jammer could be used against it. Then after they have resolved to the field, some of them have a reusable effect, this is not activating the card, just activating the effect.Later on, even if it has an effect that uses the chain (Light Barrier's does), this is only activating the 'effect' of Light Barrier, he is not 'activating Light Barrier', therefore Magic Jammer can not be used at this time.
It will activate no matter where it was sent from. If it had to be from the field, it would say so - like Sangan does.
You can activate spells and traps, and then chain Emergency Provisions at the end, sending all those activated cards to the graveyard for the cost. Unless a card's effect is 'negated', removing the activating card from the field will not stop the effect resolving. So all those spells and traps will resolve correctly - unless they are cards that need to stay on the field, like continuous, Equip cards, or Field spells.
Yes it can if you don't activate Stardust Dragon's effect. But you can choose to activate his effect to Tribute Stardust Dragon to destroy and negate EHAZs' effect.
No. The effect of Mask states that monsters cannot be tributed. Since stardust requires itself be tributed to activate the effect, you cant activate the effect.
'Activating a card' means to either place a Spell Card on the field, or Flip a Spell or Trap card face-up from a Set position.Some continuous Spells or Traps have a reusable, activated effect, such as Royal Oppression. When these effects are used, it is called 'activating the effect' of that card.
Such an effect, for example, the effect of "Dark Cat with White Tail", targets the monsters it will return. If there aren't enough valid targets, then the effect won't even activate. It is not legal to activate an effect if it can't resolve fully.This is different to legally activating an effect and then conditions changing before it resolves - that's handled on a card to card basis. In the above effect, if it was activated legally but something was chained that removed a target from the field, the effect will resolve as much as it can, returning the other targets to hand.
There is an important distinction between 'activating a spell/trap' and 'activating the effect of a spell/trap'. Light Barrier's activation was when it was placed face-up on the field, and this is the only time an activation negation card like Magic Jammer could be used against it. Then after they have resolved to the field, some of them have a reusable effect, this is not activating the card, just activating the effect.Later on, even if it has an effect that uses the chain (Light Barrier's does), this is only activating the 'effect' of Light Barrier, he is not 'activating Light Barrier', therefore Magic Jammer can not be used at this time.
It will activate no matter where it was sent from. If it had to be from the field, it would say so - like Sangan does.
You can activate spells and traps, and then chain Emergency Provisions at the end, sending all those activated cards to the graveyard for the cost. Unless a card's effect is 'negated', removing the activating card from the field will not stop the effect resolving. So all those spells and traps will resolve correctly - unless they are cards that need to stay on the field, like continuous, Equip cards, or Field spells.
Yes it can if you don't activate Stardust Dragon's effect. But you can choose to activate his effect to Tribute Stardust Dragon to destroy and negate EHAZs' effect.
Nope. Same as De-Fusion. You can't get an opponent's monster on your side of the field by activating De-Synchro or De-Fusion.
Yes, it remains on the field and can attack as long as your opponent does not activate another effect.
If you mean her effect that special summons a Fortune Lady, this only activates when she is removed from the field 'by an effect'. Offering her as tribute for any kind of cost, will not let her activate.
This strategy could be used to clear 2 monsters from your opponent's side of the field. The downside is that your opponent will not take any damage to his Life Points because of Miracle Locus' effect. There would be no point in activating De-Synchro on Junk Warrior. De-Synchro is a Normal Spell card, meaning that you must have ended your Battle Phase to activate it. At this point, you could no longer attack and activating De-Synchro only replaces your Junk Warriorwith Junk Synchron and the other Synchro Material monster. In effect, this strategy would not be recommended.
Unless specifically stated otherwise (Royal Oppression, etc), you can only activate the effects of a card you have control of. If 'your' Winged Rhynos is on the opponent's side of the field, then in game terms, it is 'his' monster. He's the only one that can activate the effect.