Karn, Legacy Reforged 
Legendary Artifact Creature — Golem
$18.60 #2528 0.50 3.3 years
Karn's power and toughness are each equal to the greatest mana value among artifacts you control.
At the beginning of your upkeep, add 
for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.
for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.Click a line or tag to filter
Cards similar to Karn, Legacy Reforged 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.
Ancient Ooze88%
$1.48↓#15579↓0.5223.3 years↑
"this card's power and toughness are each equal to the total mana value of other creatures you control."
Towering Gibbon82%
$0.33↓#12021↓0.00↓3.8 years
"this card's power is equal to the greatest mana value among creatures you control."
Kraven, Proud Predator82%
$0.19↓#18182↓0.36↓1.0 years↓
"this card's power is equal to the greatest mana value among permanents you control."
Monstrous War-Leech78%
$0.08↓#25919↓0.00↓4.0 years
"this card's power and toughness are each equal to the greatest mana value among cards in your graveyard."
Darksteel Juggernaut78%
$1.08↓#4649↓0.24↓15.9 years↑
"this card's power and toughness are each equal to the number of artifacts you control."
The Mightstone and Weakstone78%
$5.26↓#30210.07↓3.8 years
"
: Add . This mana can't be spent to cast nonartifact spells."
: Add . This mana can't be spent to cast nonartifact spells."
Hydraulic Helper77%
$0.15↓#18652↓0.00↓0.2 years↓
": Add 
. This mana can't be spent to cast a nonartifact spell."
: Add . This mana can't be spent to cast a nonartifact spell."
Daretti, Rocketeer Engineer76%
$0.17↓#8356↓0.18↓1.6 years↓
"this card's power is equal to the greatest mana value among artifacts you control."
Thran Turbine76%
$3.63↓#10472↓0.00↓27.9 years↑
"At the beginning of your upkeep, you may add . This mana can't be spent to cast spells."
. This mana can't be spent to cast spells."
Gaea's Avenger76%
$55.21↑#26343↓0.25↓32.5 years↑
"this card's power and toughness are each equal to 1 plus the number of artifacts your opponents control."
Master of Etherium76%
$0.56↓#21600.18↓17.9 years↑
"this card's power and toughness are each equal to the number of artifacts you control."
Living Lore74%
$0.11↓#23533↓0.00↓11.4 years↑
"this card's power and toughness are each equal to the exiled card's mana value."
Mishra's Workshop74%
$3249.99↑#3810↓1.55↑32.5 years↑
": Add . Spend this mana only to cast artifact spells."
: Add . Spend this mana only to cast artifact spells."
Emissary Escort74%
$0.19↓#9117↓0.23↓1.1 years↓
"This creature gets +X/+0, where X is the greatest mana value among other artifacts you control."
Filigree Attendant74%
$0.17↓#8202↓0.595.2 years↑
"this card's power is equal to the number of artifacts you control."
Cephalopod Sentry74%
$0.19↓#12658↓0.06↓3.6 years
"this card's power is equal to the number of artifacts you control."
Karolina Dean, Runaway73%
$4.64↓#19928↓0.00↓0.2 years↓
"At the beginning of your first main phase, add 
. This mana can't be spent to cast spells from your hand."
. This mana can't be spent to cast spells from your hand."
Broodstar73%
$1.03↓#9821↓0.31↓22.9 years↑
"this card's power and toughness are each equal to the number of artifacts you control."
Dodgy Jalopy72%
$0.24↓#17249↓0.05↓4.4 years↑
"this card's power is equal to the greatest mana value among creatures you control."
Battery Bearer72%
$0.09↓#25559↓0.25↓3.8 years
"Creatures you control have ": Add . This mana can't be spent to cast a nonartifact spell.""
: Add . This mana can't be spent to cast a nonartifact spell.""+1 more matching line