Cephalopod Sentry — ruling 1

The ability that defines Cephalopod Sentry's power works in all zones, not just the battlefield. As long as Cephalopod Sentry is on the battlefield (and still an artifact), that ability will count Cephalopod Sentry itself.

Cephalopod Sentry : règles, fonctionnement et interactions (MTG)

Cephalopod 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

Flying Cephalopod Sentry's power is equal to the number of artifacts you control.

How it works : Cephalopod Sentry

Original English text — Wizards of the Coast / Scryfall

#1February 4, 2023· Wizards of the Coast
The ability that defines Cephalopod Sentry's power works in all zones, not just the battlefield. As long as Cephalopod Sentry is on the battlefield (and still an artifact), that ability will count Cephalopod Sentry itself.
No other card is named in this ruling.