Spreading Insurrection — ruling 1

The copies are put directly onto the stack. They aren't cast and won't be counted by other spells with storm cast later in the turn.

Spreading Insurrection — ruling 2

Spells cast from zones other than a player's hand and spells that were countered or otherwise failed to resolve are counted by the storm ability.

Spreading Insurrection — ruling 3

A copy of a spell can be countered like any other spell, but it must be countered individually. Countering a spell with storm won't affect the copies.

Spreading Insurrection — ruling 4

The triggered ability that creates the copies can itself be countered by anything that can counter a triggered ability. If it is countered, no copies will be put onto the stack.

Spreading Insurrection — ruling 5

If a spell with storm has targets, you may choose new targets for any of the copies. You can make different choices for each copy.

Spreading Insurrection : règles, fonctionnement et interactions (MTG)

Spreading Insurrection 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

Gain control of target creature you don't control until end of turn. Untap that creature. It gains haste until end of turn. Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

How it works : Spreading Insurrection

Original English text — Wizards of the Coast / Scryfall

#1June 18, 2021· Wizards of the Coast
The copies are put directly onto the stack. They aren't cast and won't be counted by other spells with storm cast later in the turn.
No other card is named in this ruling.
#2June 18, 2021· Wizards of the Coast
Spells cast from zones other than a player's hand and spells that were countered or otherwise failed to resolve are counted by the storm ability.
No other card is named in this ruling.
#3June 18, 2021· Wizards of the Coast
A copy of a spell can be countered like any other spell, but it must be countered individually. Countering a spell with storm won't affect the copies.
No other card is named in this ruling.
#4June 18, 2021· Wizards of the Coast
The triggered ability that creates the copies can itself be countered by anything that can counter a triggered ability. If it is countered, no copies will be put onto the stack.
No other card is named in this ruling.
#5June 18, 2021· Wizards of the Coast
If a spell with storm has targets, you may choose new targets for any of the copies. You can make different choices for each copy.
No other card is named in this ruling.