Is Silver Shroud Costume legal in Standard, Modern, and Commander?

Silver Shroud Costume is legal in: Legacy, Vintage, Commander.

Silver Shroud Costume

Q: What type of card is Silver Shroud Costume?

Silver Shroud Costume is an Artifact — Equipment. Its oracle text reads: "Flash When this Equipment enters, attach it to target creature you control. That creature gains shroud until end of turn. (It can't be the target of spells or abilities.) Equipped creature can't be blocked. Equip {3}"

Artifact — Equipment

Flash

When this Equipment enters, attach it to target creature you control. That creature gains shroud until end of turn. (It can't be the target of spells or abilities.)

Equipped creature can't be blocked.

Equip