Armory of Iroas 
Artifact — Equipment
$0.22 #7937 0.22 12.3 years
Whenever equipped creature attacks, put a +1/+1 counter on it.
Equip (: Attach to target creature you control. Equip only as a sorcery.)
(: Attach to target creature you control. Equip only as a sorcery.)Click a line or tag to filter
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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.
Bone Sabres100%
$5.73↑#5958↑0.243.9 years↓
"Whenever equipped creature attacks, put four +1/+1 counters on it."
Greatsword of Tyr91%
$0.39↑#72300.32↑4.2 years↓
"Whenever equipped creature attacks, put a +1/+1 counter on it and tap up to one target creature defending player controls."
Glowcap Lantern90%
$0.24↑#11320↓0.00↓2.8 years↓
"Equip "
"
Armasaur Guide90%
$0.17↓#17748↓0.05↓1.8 years↓
"Whenever you attack with three or more creatures, put a +1/+1 counter on target creature you control."
Gleam of Battle88%
$0.16↓#13575↓0.2013.3 years
"Whenever a creature you control attacks, put a +1/+1 counter on it."
Delver's Torch87%
$0.13↓#13254↓0.05↓5.1 years↓
"Whenever equipped creature attacks, venture into the dungeon."
Black Panther, Claws of Bast86%
$2.06↑#22263↓0.00↓0.2 years↓
"Whenever a creature you control attacks alone, put a +1/+1 counter on it."
Surgical Suite // Hospital Room84%
$0.28↑#84360.251.9 years↓
"Whenever you attack, put a +1/+1 counter on target attacking creature."
Casey Jones, Back Alley Brute84%
$0.31↑#76430.00↓0.5 years↓
"Whenever this card attacks, put a +1/+1 counter on target attacking creature."
Curse of Predation84%
$0.20↓#14520↓0.2512.8 years
"Whenever a creature attacks enchanted player, put a +1/+1 counter on it."
Sword of Hours83%
$5.01↑#4996↑0.34↑5.1 years↓
"Whenever equipped creature attacks, put a +1/+1 counter on it."
+1 more matching line
Keleth, Sunmane Familiar83%
$0.21↓#67490.00↓5.8 years↓
"Whenever a commander you control attacks, put a +1/+1 counter on it."
Iconic Shield83%
$0.32↑#25050↓0.00↓0.2 years↓
"Equip 
"
"
Seismic Tutelage82%
$0.88↑#11409↓0.00↓0.8 years↓
"Whenever enchanted creature attacks, double the number of +1/+1 counters on it."
Fire Nation Engineer82%
$0.13↓#17197↓0.00↓0.8 years↓
"At the beginning of your end step, if you attacked this turn, put a +1/+1 counter on another target creature or Vehicle you control."
Fractal Harness82%
$0.30↑#64280.07↓5.4 years↓
"Whenever equipped creature attacks, double the number of +1/+1 counters on it."
+1 more matching line
Andúril, Narsil Reforged82%
$15.41↑#2604↑0.41↑2.8 years↓
"Whenever equipped creature attacks, put a +1/+1 counter on each creature you control. If you have the city's blessing, put two +1/+1 counters on each creature you control instead."
Rubblebelt Raiders82%
$0.13↓#18440↓0.3113.6 years↑
"Whenever this creature attacks, put a +1/+1 counter on it for each attacking creature you control."
Leatherhead, Iron Gator82%
$0.30↑#92210.00↓0.5 years↓
"Whenever this card attacks, put two +1/+1 counters on each creature you control."
Throwing Knife81%
$0.15↓#27172↓0.57↑11.1 years↓
"Equip "
"