Whispersilk Cloak (M11) from Magic 2011, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daren Bader
• Card Text:
  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.)