Whispersilk Cloak 
Artifact — Equipment
Equipped creature can't be blocked and has shroud. (It can't be the target of spells or abilities.)
Equip {2}
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Prowler's Helm 84%
$0.63#3347
"Equipped creature can't be blocked except by Walls."
+1 more matching line
Hedgewitch's Mask 81%
$0.28#14337
"Equipped creature can't be blocked by creatures with power 4 or greater."
+1 more matching line