Artefakt

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, zeige zwei Karten aus deiner Hand offen vor, die eine Farbe gemeinsam haben: Ziehe eine Karte.
The two revealed cards stay revealed until the ability resolves. If one of them is played, is discarded, or otherwise leaves your hand, the ability will still resolve as normal.
Colorless is not a color. You can’t reveal two colorless cards from your hand to activate this ability because those cards don’t share a color with one another.