Crude Rampart — ruling 1

If it attacks while face down and is turned face up during combat, this will not remove it from combat.

Crude Rampart : règles, fonctionnement et interactions (MTG)

Crude Rampart 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

Defender (This creature can't attack.) Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

How it works : Crude Rampart

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2004· Wizards of the Coast
If it attacks while face down and is turned face up during combat, this will not remove it from combat.
No other card is named in this ruling.