Waterfall Aerialist — ruling 1

If a player casts a spell that targets multiple permanents their opponent controls with ward, each of those ward abilities will trigger. If that player doesn’t pay for all of them, the spell will be countered.

Waterfall Aerialist : règles, fonctionnement et interactions (MTG)

Waterfall Aerialist 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 Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

How it works : Waterfall Aerialist

Original English text — Wizards of the Coast / Scryfall

#1April 16, 2021· Wizards of the Coast
If a player casts a spell that targets multiple permanents their opponent controls with ward, each of those ward abilities will trigger. If that player doesn’t pay for all of them, the spell will be countered.
No other card is named in this ruling.