Void Squall — ruling 1

Casting the card again due to the delayed triggered ability is optional. If you choose not to cast the card, or if you can’t (perhaps because there are no legal targets available), the card will stay exiled. You won’t get another chance to cast it on a future turn.

Void Squall — ruling 2

If a spell with rebound that you cast from your hand doesn’t resolve for any reason (either because another spell or ability counters it or because all its targets are illegal as it tries to resolve), none of its effects will happen, including rebound. The spell will be put into its owner’s graveyard and you won’t get to cast it again on your next turn.

Void Squall — ruling 3

At the beginning of your upkeep, all delayed triggered abilities created by rebound effects trigger. You may handle them in any order. If you want to cast a card this way, you do so as part of the resolution of its delayed triggered ability. Timing restrictions based on the card’s type (if it’s a sorcery) are ignored. Other restrictions, such as “Cast [this spell] only during combat,” must be followed.

Void Squall — ruling 4

As long as you cast a spell with rebound from your hand, rebound will work regardless of whether you paid its mana cost or an alternative cost you were permitted to pay.

Void Squall — ruling 5

If you cast a spell with rebound from any zone other than your hand (including your opponent’s hand), rebound will have no effect.

Void Squall — ruling 6

If a replacement effect (such as the one created by Rest in Peace) would cause a spell with rebound that you cast from your hand to be put somewhere other than into your graveyard as it resolves, you can choose whether to apply the rebound effect or the other effect as the spell resolves.

Void Squall — ruling 7

Rebound will have no effect on copies of spells because you don’t cast them from your hand.

Void Squall — ruling 8

If you cast a card from exile this way, it will go to its owner’s graveyard when it resolves, fails to resolve, or is countered. It won’t go back to exile.

Void Squall : règles, fonctionnement et interactions (MTG)

Void Squall is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Return target nonland permanent to its owner's hand. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

How it works : Void Squall

Original English text — Wizards of the Coast / Scryfall

#1February 25, 2015· Wizards of the Coast
Casting the card again due to the delayed triggered ability is optional. If you choose not to cast the card, or if you can’t (perhaps because there are no legal targets available), the card will stay exiled. You won’t get another chance to cast it on a future turn.
No other card is named in this ruling.
#2February 25, 2015· Wizards of the Coast
If a spell with rebound that you cast from your hand doesn’t resolve for any reason (either because another spell or ability counters it or because all its targets are illegal as it tries to resolve), none of its effects will happen, including rebound. The spell will be put into its owner’s graveyard and you won’t get to cast it again on your next turn.
No other card is named in this ruling.
#3February 25, 2015· Wizards of the Coast
At the beginning of your upkeep, all delayed triggered abilities created by rebound effects trigger. You may handle them in any order. If you want to cast a card this way, you do so as part of the resolution of its delayed triggered ability. Timing restrictions based on the card’s type (if it’s a sorcery) are ignored. Other restrictions, such as “Cast [this spell] only during combat,” must be followed.
No other card is named in this ruling.
#4February 25, 2015· Wizards of the Coast
As long as you cast a spell with rebound from your hand, rebound will work regardless of whether you paid its mana cost or an alternative cost you were permitted to pay.
No other card is named in this ruling.
#5February 25, 2015· Wizards of the Coast
If you cast a spell with rebound from any zone other than your hand (including your opponent’s hand), rebound will have no effect.
No other card is named in this ruling.
#6February 25, 2015· Wizards of the Coast
If a replacement effect (such as the one created by Rest in Peace) would cause a spell with rebound that you cast from your hand to be put somewhere other than into your graveyard as it resolves, you can choose whether to apply the rebound effect or the other effect as the spell resolves.
No other card is named in this ruling.
#7February 25, 2015· Wizards of the Coast
Rebound will have no effect on copies of spells because you don’t cast them from your hand.
No other card is named in this ruling.
#8February 25, 2015· Wizards of the Coast
If you cast a card from exile this way, it will go to its owner’s graveyard when it resolves, fails to resolve, or is countered. It won’t go back to exile.
No other card is named in this ruling.