Aether Gust — ruling 1

The owner of the target spell or permanent chooses to put it either on the top or bottom of their library.

Aether Gust — ruling 2

If a spell is put into its owner’s library, it’s removed from the stack and thus will not resolve. The spell isn’t countered; it no longer exists. This works against a spell that can’t be countered.

Aether Gust : règles, fonctionnement et interactions (MTG)

Aether Gust 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

Choose target spell or permanent that's red or green. Its owner puts it on their choice of the top or bottom of their library.

How it works : Aether Gust

Original English text — Wizards of the Coast / Scryfall

#1July 12, 2019· Wizards of the Coast
The owner of the target spell or permanent chooses to put it either on the top or bottom of their library.
No other card is named in this ruling.
#2July 12, 2019· Wizards of the Coast
If a spell is put into its owner’s library, it’s removed from the stack and thus will not resolve. The spell isn’t countered; it no longer exists. This works against a spell that can’t be countered.
No other card is named in this ruling.