Vectis Silencers — ruling 1

If you activate the ability multiple times during the same turn, Vectis Silencers will gain multiple instances of deathtouch; however, multiple instances of deathtouch are redundant. A creature dealt damage by a source with deathtouch is destroyed as a state-based action the next time they are checked, so a single regeneration effect will save it regardless of how many instances of deathtouch the source had at the time damage was dealt.

Vectis Silencers — ruling 2

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.

Vectis Silencers : règles, fonctionnement et interactions (MTG)

Vectis Silencers 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 creature gains deathtouch until end of turn. (Any amount of damage it deals to a creature is enough to destroy that creature.)

How it works : Vectis Silencers

Original English text — Wizards of the Coast / Scryfall

#1October 1, 2009· Wizards of the Coast
If you activate the ability multiple times during the same turn, Vectis Silencers will gain multiple instances of deathtouch; however, multiple instances of deathtouch are redundant. A creature dealt damage by a source with deathtouch is destroyed as a state-based action the next time they are checked, so a single regeneration effect will save it regardless of how many instances of deathtouch the source had at the time damage was dealt.
No other card is named in this ruling.
#2October 1, 2008· Wizards of the Coast
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.
No other card is named in this ruling.