Stoneforge Masterwork 
Artifact — Equipment
$4.31 #4976 0.65 10.7 years
Equipped creature gets +1/+1 for each other creature you control that shares a creature type with it.
Equip 
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Cards similar to Stoneforge Masterwork 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.
Alpha Status92%
$4.48↑#8794↓0.53↓23.4 years↑
"Enchanted creature gets +2/+2 for each other creature on the battlefield that shares a creature type with it."
Coat of Arms77%
$12.24↑#960↑0.82↑28.3 years↑
"Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it."
Konda's Banner76%
$5.35↑#11053↓0.11↓22.1 years↑
"Creatures that share a creature type with equipped creature get +1/+1."
+1 more matching line
Kemba's Banner76%
$0.34↓#10307↓0.25↓3.7 years↓
"Equipped creature gets +1/+1 for each creature you control."
Shared Animosity74%
$4.15↓#686↑0.40↓18.7 years↑
"Whenever a creature you control attacks, it gets +1/+0 until end of turn for each other attacking creature that shares a creature type with it."
Heirloom Blade72%
$0.24↓#3900↑0.11↓9.2 years↓
"Equipped creature gets +3/+1."
+1 more matching line
Skemfar Shadowsage70%
$0.29↓#45890.09↓5.7 years↓
"• You gain X life, where X is the greatest number of creatures you control that have a creature type in common."
White Lotus Tile70%
$4.74↑#3855↑0.31↓0.9 years↓
"
: Add X mana of any one color, where X is the greatest number of creatures you control that have a creature type in common."
: Add X mana of any one color, where X is the greatest number of creatures you control that have a creature type in common."