Instill Furor — ruling 1

Instill Furor grants a triggered ability that triggers at the end of the creature’s controller’s turn.

Instill Furor — ruling 2

Once the ability triggers, nothing that happens to Instill Furor can prevent the ability from resolving.

Instill Furor : règles, fonctionnement et interactions (MTG)

Instill Furor 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

Enchant creature Enchanted creature has "At the beginning of your end step, sacrifice this creature unless it attacked this turn."

How it works : Instill Furor

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2005· Wizards of the Coast
Instill Furor grants a triggered ability that triggers at the end of the creature’s controller’s turn.
No other card is named in this ruling.
#2October 1, 2005· Wizards of the Coast
Once the ability triggers, nothing that happens to Instill Furor can prevent the ability from resolving.
No other card is named in this ruling.