Clip Wings — ruling 1

You can cast Clip Wings even if some (or all) of your opponents don’t control a creature with flying. Those who do must each choose a flying creature to sacrifice, and those who don’t are unaffected.

Clip Wings : règles, fonctionnement et interactions (MTG)

Clip Wings 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

Each opponent sacrifices a creature of their choice with flying.

How it works : Clip Wings

Original English text — Wizards of the Coast / Scryfall

#1April 8, 2016· Wizards of the Coast
You can cast Clip Wings even if some (or all) of your opponents don’t control a creature with flying. Those who do must each choose a flying creature to sacrifice, and those who don’t are unaffected.
No other card is named in this ruling.