Impending Flux — ruling 1

If you cast Impending Flux from exile, it counts itself when determining the value of X.

Impending Flux — ruling 2

Because exiling a card with foretell from your hand is a special action, you can do so any time you have priority during your turn, including in response to spells and abilities. Once you announce you're taking the action, no other player can respond by trying to remove the card from your hand.

Impending Flux — ruling 3

Casting a foretold card from exile follows the timing rules for that card. If you foretell an instant card, you can cast it as soon as the next player's turn. In most cases, if you foretell a card that isn't an instant (like Impending Flux), you'll have to wait until your next turn to cast it.

Impending Flux — ruling 4

Paradox abilities count any spells cast from zones other than your hand. These are usually spells cast from exile, the graveyard, or the command zone. They also count spells cast from outside the game, such as spells cast with Wish or Garth One-Eye's ability.

Impending Flux — ruling 5

An instant or sorcery that counts how many spells you've cast from anywhere other than your hand, such as Surge of Brilliance, counts itself if it was cast from a zone other than your hand.

Impending Flux — ruling 6

A triggered ability that triggers when a spell is cast from anywhere other than your hand, such as that of The Thirteenth Doctor, functions only on the battlefield, so it doesn't trigger when you cast that spell from a zone other than your hand.

Impending Flux — ruling 7

If a spell or ability allows you to copy a spell on the stack but doesn't specify that the spell is cast, that spell wasn't cast and won't be counted by paradox abilities. However, if a spell or ability allows you to cast a copy of a spell, that spell will be counted for paradox abilities.

Impending Flux : règles, fonctionnement et interactions (MTG)

Impending Flux 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

Paradox — Impending Flux deals X damage to each opponent and each creature they control, where X is 1 plus the number of spells you've cast from anywhere other than your hand this turn. Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

How it works : Impending Flux

Original English text — Wizards of the Coast / Scryfall

#1October 13, 2023· Wizards of the Coast
If you cast Impending Flux from exile, it counts itself when determining the value of X.
No other card is named in this ruling.
#2October 13, 2023· Wizards of the Coast
Because exiling a card with foretell from your hand is a special action, you can do so any time you have priority during your turn, including in response to spells and abilities. Once you announce you're taking the action, no other player can respond by trying to remove the card from your hand.
Card named in this ruling
Foretell
#3October 13, 2023· Wizards of the Coast
Casting a foretold card from exile follows the timing rules for that card. If you foretell an instant card, you can cast it as soon as the next player's turn. In most cases, if you foretell a card that isn't an instant (like Impending Flux), you'll have to wait until your next turn to cast it.
Card named in this ruling
Foretell
#4October 13, 2023· Wizards of the Coast
Paradox abilities count any spells cast from zones other than your hand. These are usually spells cast from exile, the graveyard, or the command zone. They also count spells cast from outside the game, such as spells cast with Wish or Garth One-Eye's ability.
No other card is named in this ruling.
#5October 13, 2023· Wizards of the Coast
An instant or sorcery that counts how many spells you've cast from anywhere other than your hand, such as Surge of Brilliance, counts itself if it was cast from a zone other than your hand.
No other card is named in this ruling.
#6October 13, 2023· Wizards of the Coast
A triggered ability that triggers when a spell is cast from anywhere other than your hand, such as that of The Thirteenth Doctor, functions only on the battlefield, so it doesn't trigger when you cast that spell from a zone other than your hand.
No other card is named in this ruling.
#7October 13, 2023· Wizards of the Coast
If a spell or ability allows you to copy a spell on the stack but doesn't specify that the spell is cast, that spell wasn't cast and won't be counted by paradox abilities. However, if a spell or ability allows you to cast a copy of a spell, that spell will be counted for paradox abilities.
No other card is named in this ruling.