Grappling Hook 
Artifact — Equipment
Equipped creature has double strike.
Whenever equipped creature attacks, you may have target creature block it this turn if able.
Equip {4}
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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.
Goma Fada Vanguard 84%
$0.09#15871
"Whenever this creature attacks, target creature an opponent controls with power less than or equal to the number of Warriors you control can't block this turn."
Plasma Jockey 83%
$0.12#21759
"Whenever this creature attacks, target creature an opponent controls can't block this turn."
Clamor Shaman 83%
$0.13#19472
"Whenever this creature attacks, target creature an opponent controls can't block this turn."
Radha's Firebrand 82%
$0.18#21319
"Whenever this creature attacks, target creature defending player controls with power less than this creature's power can't block this turn."
Gilded Cerodon 82%
$0.04#27831
"Whenever this creature attacks, if you control a Desert or there is a Desert card in your graveyard, target creature can't block this turn."
Avalanche Tusker 81%
$0.16#25019
"Whenever this creature attacks, target creature defending player controls blocks it this combat if able."
Spider-Man, Web-Spinner 81%
$23.90#23672
"Whenever this card attacks, target creature can't block this turn."
+1 more matching line
Grotag Thrasher 81%
$0.11#27970
"Whenever this creature attacks, target creature can't block this turn."
Goblin Heelcutter 81%
$0.08#20211
"Whenever this creature attacks, target creature can't block this turn."
Mardu Roughrider 81%
$0.10#24229
"Whenever this creature attacks, target creature can't block this turn."
Crashing Boars 80%
#29408
"Whenever this creature attacks, defending player chooses an untapped creature they control. That creature blocks this creature this turn if able."
Magnetic Web 80%
$0.70#20119
"Whenever a creature with a magnet counter on it attacks, all creatures with magnet counters on them block that creature this turn if able."