Executioner's Capsule
Artifact
, 
, Sacrifice this artifact: Destroy target nonblack creature.
There is always a moment of trepidation before opening a message capsule, for fear of the judgment that might be contained within.
Warren Mahy
Commander 2016 (C16)
• #109Rulings
The only difference between a colored artifact and a colorless artifact is, obviously, its color. Unlike most artifacts, a colored artifact requires colored mana to cast. Also unlike most artifacts, a colored artifact has a color in all zones. It will interact with cards that care about color. Other than that, a colored artifact behaves just like any other artifact. It will interact as normal with any card that cares about artifacts, such as Shatter or Arcbound Ravager.
(wotc • 2008-10-01)
Rulings
The only difference between a colored artifact and a colorless artifact is, obviously, its color. Unlike most artifacts, a colored artifact requires colored mana to cast. Also unlike most artifacts, a colored artifact has a color in all zones. It will interact with cards that care about color. Other than that, a colored artifact behaves just like any other artifact. It will interact as normal with any card that cares about artifacts, such as Shatter or Arcbound Ravager.
(wotc • 2008-10-01)