Beyond just offering Shroud for a turn, Silver Shroud Costume also prevents the equipped creature from being blocked
Mark Rosewater (February 20, 2024)
It fits well into a lot of different subcultures
Skullclamp is a staple of Token decks, as most are going to be 1/1s, allowing you to easily draw out a lot of cards from your deck to get to your win conditions
It stops everything that youre afraid of in the matchup: Jushi, Meloku, and more importantly Azami, and all of this for the low cost of one mana, making it very hard to counter
Most instances of either gating condition are on activated abilities (most of which don't cost mana and therefore need a limiting condition), neatly solving the issue I'm about to mention, but consider this example: We're playing Innistrad Crimson Vow draft