Vorinclex, Voice of Hunger 
Legendary Creature — Phyrexian Praetor
$4.93 #1758 2.61 15.3 years
Trample
Whenever you tap a land for mana, add one mana of any type that land produced.
Whenever an opponent taps a land for mana, that land doesn't untap during its controller's next untap step.
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Cards similar to Vorinclex, Voice of Hunger 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.
Winter's Night91%
$0.87↓#29674↓0.15↓30.2 years↑
"Whenever a player taps a snow land for mana, that player adds one mana of any type that land produced. That land doesn't untap during its controller's next untap step."
Nikya of the Old Ways90%
$0.37↓#10535↓0.50↓7.6 years↓
"Whenever you tap a land for mana, add one mana of any type that land produced."
Zhur-Taa Ancient86%
$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 Karametra86%
$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."
Zendikar Resurgent85%
$2.41↓#2336↓0.47↓10.6 years↓
"Whenever you tap a land for mana, add one mana of any type that land produced."
Mirari's Wake85%
$5.74↑#697↑0.66↓24.3 years↑
"Whenever you tap a land for mana, add one mana of any type that land produced."
Groundchuck & Dirtbag85%
$0.41↓#9259↓0.00↓0.5 years↓
"Whenever you tap a land for mana, add ."
."+1 more matching line
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."
Mana Vapors82%
$0.33↓#22219↓1.51↓26.3 years↑
"Lands target player controls don't untap during their next untap step."
Nyxbloom Ancient80%
$27.83↑#1021↑1.25↓6.6 years↓
"If you tap a permanent for mana, it produces three times as much of that mana instead."
+1 more matching line
Mana Reflection80%
$1.23↓#18230.60↓18.3 years↑
"If you tap a permanent for mana, it produces twice as much of that mana instead."
Nirkana Revenant78%
$7.52↑#2896↓0.38↓16.4 years↑
"Whenever you tap a Swamp for mana, add an additional 
."
."
Crypt Ghast78%
$12.64↑#527↑0.73↓13.6 years↓
"Whenever you tap a Swamp for mana, add an additional ."
."
Leyline of Abundance78%
$1.65↓#2969↓0.43↓7.2 years↓
"Whenever you tap a creature for mana, add an additional ."
."
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."
Vernal Bloom78%
$4.17↓#10748↓0.31↓27.9 years↑
"Whenever a Forest is tapped for mana, its controller adds an additional ."
."
Regal Behemoth78%
$0.44↓#2400↓0.28↓10.0 years↓
"Whenever you tap a land for mana while you're the monarch, add an additional one mana of any color."
+1 more matching line
Wolfwillow Haven77%
$0.24↓#4907↓0.14↓6.6 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional ."
."
Market Festival77%
$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."