Boarded Window — ruling 1

Boarded Window's triggered ability checks the total amount of damage dealt to you during the turn. That damage needn't have been dealt all at once, and Boarded Window needn't have been on the battlefield at the time the damage was dealt. Boarded Window doesn't take into account any life that you gained this turn.

Boarded Window : règles, fonctionnement et interactions (MTG)

Boarded Window 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

Creatures attacking you get -1/-0. At the beginning of each end step, if you were dealt 4 or more damage this turn, exile this artifact.

How it works : Boarded Window

Original English text — Wizards of the Coast / Scryfall

#1November 19, 2021· Wizards of the Coast
Boarded Window's triggered ability checks the total amount of damage dealt to you during the turn. That damage needn't have been dealt all at once, and Boarded Window needn't have been on the battlefield at the time the damage was dealt. Boarded Window doesn't take into account any life that you gained this turn.
No other card is named in this ruling.