Council of Elrond

You are allowed to play a hazard which is legally playable even if it will have no practical effect on play.

e.g., You may declare Beorning Skin-Changers in order to get it out of your hand, even if the moving company you play it against contains Beorn.

You are not allowed to play a hazard which cannot legally be played simply to get it out of your hand.

e.g., You may not declare Muster Disperses in order to get it out of your hand, if your opponent has no factions in play.

To clarify: You may declare a hazard which has a single effect, even if that effect will automatically be cancelled, correct?

e.g., Bane of the Ithil-Stone is in play. The Mouth is in play. Mouth of Sauron may still be declared as a short event by the hazard player in order to bounce The Mouth from play, even though the effect of the hazard will be automatically canceled. Is this correct?

Each event that could be played has potentially an effect.

At resolution of Beorning Skin-Changers there may be no longer Beorn (or untapped warrior with prowess greater than 4).
At resolution of Mouth of Sauron there may be no longer Bane of the Ithil-Stone.

the Jabberwock wrote: ↑Thu Jul 19, 2018 5:48 am To clarify: You may declare a hazard which has a single effect, even if that effect will automatically be cancelled, correct?

You may declare a hazard which has a single effect, even if that effect will automatically be cancelled, according to effects in play at time of the declaration.

Sentences in rules that say that a cards may not be played for no effect, do not address any existing problem.

@ Konrad -

Thank you for the clarification. That confirmed what I thought to be the case.

One question, regarding this comment:

Konrad Klar wrote: ↑Thu Jul 19, 2018 6:39 am Sentences in rules that say that a cards may not be played for no effect, do not address any existing problem.

Can you clarify please what you mean by this? How exactly should "cards may not be played for no effect" be applied/interpreted?

the Jabberwock wrote: ↑Sat Jul 21, 2018 4:00 am How exactly should "cards may not be played for no effect" be applied/interpreted?

If playability conditions of a card exist, the card may be played. Whether the card will have any effect on play or not, is no criterion.
Even if in circumstances that exit when the card is declared it will not have any effect on play, it cannot be excluded that in circumstances at resolution of the card, the card will have an effect on play.