Etched Champion — ruling 1

"Protection from all colors" means protection from white, from blue, from black, from red, and from green. (In other words, it doesn't just mean "protection from objects that have all five colors.")

Etched Champion : règles, fonctionnement et interactions (MTG)

Etched Champion 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

Metalcraft — This creature has protection from each color as long as you control three or more artifacts.

How it works : Etched Champion

Original English text — Wizards of the Coast / Scryfall

#1January 1, 2011· Wizards of the Coast
"Protection from all colors" means protection from white, from blue, from black, from red, and from green. (In other words, it doesn't just mean "protection from objects that have all five colors.")
No other card is named in this ruling.