Tomb Fortress — ruling 1

The creature card that you return to the battlefield doesn't have to be one of the cards you milled. It can be a card that was already in your graveyard before you milled.

Tomb Fortress : règles, fonctionnement et interactions (MTG)

Tomb Fortress 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

This land enters tapped. : Add . , , Exile this land: Mill four cards, then return a creature card from your graveyard to the battlefield. Activate only as a sorcery.

How it works : Tomb Fortress

Original English text — Wizards of the Coast / Scryfall

#1October 7, 2022· Wizards of the Coast
The creature card that you return to the battlefield doesn't have to be one of the cards you milled. It can be a card that was already in your graveyard before you milled.
No other card is named in this ruling.