Extraplanar Lens 
Artifact
$12.48 #1709 0.33 22.9 years
Imprint — When this artifact enters, you may exile target land you control.
Whenever a land with the same name as the exiled card is tapped for mana, its controller adds one mana of any type that land produced.
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Cards similar to Extraplanar Lens 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.
Zhur-Taa Ancient84%
$0.40↓#8250↓0.12↓13.3 years↓
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Dictate of Karametra84%
$0.88↓#6154↓0.12↓12.3 years↓
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Vernal Bloom84%
$4.17↓#10748↓0.3127.9 years↑
"Whenever a Forest is tapped for mana, its controller adds an additional 
."
."
Wolfwillow Haven82%
$0.24↓#4907↓0.14↓6.6 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional ."
."
Market Festival82%
$0.17↓#10468↓0.46↑12.3 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional two mana in any combination of colors."
Dawn's Reflection82%
$0.22↓#8972↓0.22↓22.3 years
"Whenever enchanted land is tapped for mana, its controller adds an additional two mana in any combination of colors."
Heartbeat of Spring82%
$2.22↓#4250↓0.54↑21.9 years
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Mana Flare82%
$0.47↓#3297↓0.58↑33.1 years↑
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Overgrowth81%
$0.24↓#3075↓0.22↓28.5 years↑
"Whenever enchanted land is tapped for mana, its controller adds an additional ."
."
Wild Growth80%
$0.35↓#212↑0.16↓33.1 years↑
"Whenever enchanted land is tapped for mana, its controller adds an additional ."
."
Gauntlet of Might79%
$582.49↑#12361↓0.86↑33.1 years↑
"Whenever a Mountain is tapped for mana, its controller adds an additional 
."
."
Verdant Haven79%
$0.05↓#12547↓0.00↓13.6 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color."
Barbflare Gremlin78%
$0.35↓#7890↓0.331.9 years↓
"Whenever a player taps a land for mana, if this creature is tapped, that player adds one mana of any type that land produced. Then that land deals 1 damage to that player."
Overabundance78%
$5.52↓#9990↓0.44↑25.9 years↑
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced, and this enchantment deals 1 damage to the player."
Nikya of the Old Ways78%
$0.37↓#10535↓0.50↑7.6 years↓
"Whenever you tap a land for mana, add one mana of any type that land produced."
Fertile Ground78%
$0.27↓#1065↑0.15↓27.9 years↑
"Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color."
Blighted Burgeoning76%
$0.14↓#12818↓0.00↓3.4 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color."
Shimmerwilds Growth76%
$0.29↓#8359↓0.00↓0.6 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional one mana of the chosen color."
Glittering Frost76%
$0.20↓#10437↓0.16↓5.6 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color."
Utopia Sprawl76%
$1.18↓#347↑0.15↓20.3 years↓
"Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color."