19 Mar 2021
Each time you cast Haze of Rage in a turn, its storm ability will trigger. Each spell you cast before it will be considered when determining how many copies are created, but previous times you created copies of a spell will not.
19 Mar 2021
Haze of Rage affects only creatures you control at the time it resolves. Creatures you begin to control later in the turn won't get +1/+0.
8 Dec 2022
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.
8 Dec 2022
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.
8 Dec 2022
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.
8 Dec 2022
Spells cast from zones other than a player's hand and spells that were countered are counted by the storm ability.