A panther does not announce its presence. It stalks its prey unseen.

Whispersilk Cloak

Equipped creature can't be blocked and has shroud. (It can't be the target of spells or abilities.)
Equip {2}

Equipped creature is unblockable and can't be the target of spells or abilities.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery. This card comes into play unattached and stays in play if the creature leaves play.)

The List

"Creatures of stone, hearts of rock, give my enemies a terrible shock!"
—Shadow Weaver

Secret Lair Drop

Marvel Super Heroes Commander

Such cloaks are in high demand both by assassins and by those who fear them.

Duskmourn: House of Horror Commander

The Lost Caverns of Ixalan Art Series

Whispersilk Cloak // Whispersilk Cloak

"It bends the light somehow, rendering it—and its wearer—functionally invisible. I never would have found it if I hadn't tripped over it!"
—Quintorius Kand, research notes

The Lost Caverns of Ixalan Commander

Equipped creature can't be blocked and has shroud.
Equip {2}

"Are these magic cloaks?" asked Pippin.
"I do not know what you mean by that," answered the leader of the Elves.

Tales of Middle-earth Commander

Planechase Anthology

Commander 2016

Planechase 2012

Equipped creature is unblockable and has shroud.
Equip {2}

Magic 2011

Equipped creature is unblockable.
Equipped creature has shroud. (It can't be the target of spells or abilities.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Duel Decks: Phyrexia vs. the Coalition

Magic 2010

Tenth Edition

Equipped creature is unblockable and has shroud. (It can't be the target of spells or abilities.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)