Syr Gwyn, Hero of Ashvale 
Legendary Creature — Human Knight
$2.66 #10909 0.29 6.9 years
Vigilance, menace
Whenever an equipped creature you control attacks, you draw a card and you lose 1 life.
Equipment you control have equip Knight 
.
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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.
Voltaic Whip85%
$0.21↓#23090↓0.00↓0.2 years↓
"Equipped creature gets +2/+0 and has "Whenever this creature attacks alone, you draw a card and lose 1 life.""
Audacious Thief84%
$0.09↓#93210.247.2 years
"Whenever this creature attacks, you draw a card and you lose 1 life."
Moonglove Extractor84%
$0.08↓#14432↓0.00↓0.6 years↓
"Whenever this creature attacks, you draw a card and lose 1 life."
Coercive Impetus83%
$0.33↓#7325↑0.00↓0.4 years↓
"Whenever enchanted creature attacks, you draw a card and lose 1 life."
Stormbeacon Blade80%
$0.23↓#123890.11↓1.4 years↓
"Whenever equipped creature attacks, draw a card if you control three or more attacking creatures."
+1 more matching line
The Chief Warg80%
$0.22↓#18749↓0.00↓0.1 years↓
"Whenever you attack while you control a creature with power 4 or greater, you draw a card and lose 1 life."
+1 more matching line
Bilbo's Ring78%
$8.89↑#4834↑0.233.2 years↓
"Whenever equipped creature attacks alone, you draw a card and you lose 1 life."
Military Intelligence78%
$0.27↓#6308↑0.15↓12.1 years↑
"Whenever you attack with two or more creatures, draw a card."
Akiri, Fearless Voyager76%
$0.81↓#2052↑0.09↓5.9 years
"Whenever you attack a player with one or more equipped creatures, draw a card."
Locthwain Lancer76%
$0.32↓#94450.203.4 years↓
"Menace"
Agent Venom76%
$0.41↓#6229↑0.46↑1.0 years↓
"Whenever another nontoken creature you control dies, you draw a card and lose 1 life."
+1 more matching line
Shanid, Sleepers' Scourge76%
$2.27↓#4611↑0.224.0 years↓
"Menace"
+1 more matching line
Overwhelming Instinct75%
$0.15↓#13601↓0.2523.9 years↑
"Whenever you attack with three or more creatures, draw a card."
Steelclaw Lance74%
$0.25↓#23876↓0.00↓6.9 years
"Equip Knight 
"
"
Sokka, Lateral Strategist74%
$0.19↓#7600↑0.00↓0.8 years↓
"Whenever this card and at least one other creature attack, draw a card."
Kinsbaile Cavalier74%
$3.77↑#6742↑0.00↓18.6 years↑
"Knight creatures you control have double strike."
Glimmer Lens74%
$3.28↑#5441↑0.07↓3.6 years↓
"Whenever equipped creature and at least one other creature attack, draw a card."
Demonic Covenant74%
$0.27↓#7988↑0.18↓1.9 years↓
"Whenever one or more Demons you control attack a player, you draw a card and lose 1 life."
Metropolis Angel74%
$0.21↓#17340↓0.00↓4.4 years↓
"Whenever you attack with one or more creatures with counters on them, draw a card."
Stormfist Crusader74%
$0.41↓#1941↑0.17↓6.9 years
"Menace"
+1 more matching line