Nullstone Gargoyle — ruling 1

Nullstone Gargoyle cares about the first noncreature spell cast during a turn, not the first one it “sees.” If a noncreature spell was cast before Nullstone Gargoyle entered the battlefield, it won’t counter the next one.

Nullstone Gargoyle — ruling 2

If another spell is cast in response to the first spell, Nullstone Gargoyle doesn’t affect that second spell.

Nullstone Gargoyle : règles, fonctionnement et interactions (MTG)

Nullstone Gargoyle 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

Flying Whenever the first noncreature spell of a turn is cast, counter that spell.

How it works : Nullstone Gargoyle

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2005· Wizards of the Coast
Nullstone Gargoyle cares about the first noncreature spell cast during a turn, not the first one it “sees.” If a noncreature spell was cast before Nullstone Gargoyle entered the battlefield, it won’t counter the next one.
No other card is named in this ruling.
#2October 1, 2005· Wizards of the Coast
If another spell is cast in response to the first spell, Nullstone Gargoyle doesn’t affect that second spell.
No other card is named in this ruling.