Vorinclex, Voice of Hunger 
Legendary Creature — Phyrexian Praetor
$4.74 #1766 2.55 15.4 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%
$0.84↓#30098↓0.06↓30.4 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%
$0.33↓#10750↓0.24↓7.7 years↓
"Whenever you tap a land for mana, add one mana of any type that land produced."
Zhur-Taa Ancient86%
$0.33↓#8336↓0.00↓13.5 years↓
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Mirari's Wake85%
$3.05↓#713↑0.67↓24.4 years↑
"Whenever you tap a land for mana, add one mana of any type that land produced."
Groundchuck & Dirtbag84%
$0.41↓#8597↓0.38↓0.6 years↓
"Whenever you tap a land for mana, add ."
."
Zendikar Resurgent82%
$2.60↓#2455↓0.38↓10.7 years↓
"Whenever you tap a land for mana, add one mana of any type that land produced."
Mana Vapors82%
$0.33↓#22492↓1.52↓26.4 years↑
"Lands target player controls don't untap during their next untap step."
Dictate of Karametra80%
$0.79↓#6270↓0.12↓12.5 years↓
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Nyxbloom Ancient80%
$28.24↑#1026↑1.26↓6.7 years↓
"If you tap a permanent for mana, it produces three times as much of that mana instead."
+1 more matching line
Mana Reflection80%
$2.12↓#18330.51↓18.5 years↑
"If you tap a permanent for mana, it produces twice as much of that mana instead."
Crypt Ghast78%
$12.63↑#522↑0.65↓13.7 years↓
"Whenever you tap a Swamp for mana, add an additional 
."
."
Nirkana Revenant78%
$7.45↑#2963↓0.37↓16.5 years↑
"Whenever you tap a Swamp for mana, add an additional ."
."
Mana Flare78%
$0.53↓#3340↓0.36↓33.2 years↑
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Heartbeat of Spring78%
$2.32↓#4288↓0.39↓22.1 years↑
"Whenever a player taps a land for mana, that player adds one mana of any type that land produced."
Leyline of Abundance78%
$1.81↓#3023↓0.56↓7.3 years↓
"Whenever you tap a creature for mana, add an additional ."
."
Overabundance78%
$5.67↑#10117↓0.59↓26.0 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."
Regal Behemoth78%
$0.60↓#2456↓0.43↓10.1 years↓
"Whenever you tap a land for mana while you're the monarch, add an additional one mana of any color."
Wolfwillow Haven77%
$0.18↓#4995↓0.00↓6.7 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional ."
."
Market Festival77%
$0.22↓#10638↓0.33↓12.5 years↓
"Whenever enchanted land is tapped for mana, its controller adds an additional two mana in any combination of colors."
Dawn's Reflection77%
$0.20↓#9146↓0.33↓22.4 years↑
"Whenever enchanted land is tapped for mana, its controller adds an additional two mana in any combination of colors."