Icewrought Sentry — ruling 1

Icewrought Sentry's last ability will trigger only when an effect instructs you to tap an opponent's creature. It won't trigger if a spell or ability you control instructs an opponent to tap a creature they control. For example, if you control Tangle Wire and an opponent taps an untapped creature they control as part of the resolution of Tangle Wire's triggered ability, Icewrought Sentry's ability won't trigger.

Icewrought Sentry : règles, fonctionnement et interactions (MTG)

Icewrought Sentry 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

Vigilance Whenever this creature attacks, you may pay . When you do, tap target creature an opponent controls. Whenever you tap an untapped creature an opponent controls, this creature gets +2/+1 until end of turn.

How it works : Icewrought Sentry

Original English text — Wizards of the Coast / Scryfall

#1September 1, 2023· Wizards of the Coast
Icewrought Sentry's last ability will trigger only when an effect instructs you to tap an opponent's creature. It won't trigger if a spell or ability you control instructs an opponent to tap a creature they control. For example, if you control Tangle Wire and an opponent taps an untapped creature they control as part of the resolution of Tangle Wire's triggered ability, Icewrought Sentry's ability won't trigger.
No other card is named in this ruling.