Korvold, Gleeful Glutton 
Legendary Creature — Dragon Noble
$0.49 #17219 0.32 3.0 years
This spell costs 
less to cast for each card type among permanents you've sacrificed this turn.
less to cast for each card type among permanents you've sacrificed this turn.Flying, trample, haste
Whenever Korvold deals combat damage to a player, put X +1/+1 counters on Korvold and draw X cards, where X is the number of permanent types among cards in your graveyard.
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Cards similar to Korvold, Gleeful Glutton 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.
Count Nefaria80%
$0.18↓#30303↓0.00↓0.2 years↓
"This spell costs 
less to cast if you've sacrificed a permanent this turn."
less to cast if you've sacrificed a permanent this turn."
Marcus, Mutant Mayor80%
$0.86↑#6507↑0.332.5 years
"Whenever a creature you control deals combat damage to a player, draw a card if that creature has a +1/+1 counter on it. If it doesn't, put a +1/+1 counter on it."
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$0.21↓#21350↓0.00↓4.4 years↑
"Flying, trample"
+1 more matching line
The Balrog, Durin's Bane78%
$0.47↓#6570↑0.43↑3.2 years
"This spell costs less to cast for each permanent sacrificed this turn."
less to cast for each permanent sacrificed this turn."
Scour the Laboratory77%
$0.11↓#26430↓0.10↓10.1 years↑
"This spell costs 
less to cast if there are four or more card types among cards in your graveyard."
less to cast if there are four or more card types among cards in your graveyard."
Surrakar Spellblade76%
$0.30↓#170060.20↓16.4 years↑
"Whenever this creature deals combat damage to a player, you may draw X cards, where X is the number of charge counters on it."
Marchesa's Infiltrator76%
$0.23↓#22216↓0.3312.2 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Professor Hulk75%
$1.20↑#10885↑0.00↓0.2 years↓
"Whenever this card deals combat damage to a player, draw that many cards."
Sea-Dasher Octopus75%
$0.80↑#4721↑0.18↓6.4 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Scroll Thief75%
$0.06↓#170950.3616.1 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Nine-Tail White Fox75%
$0.21↓#22046↓0.318.2 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Stealer of Secrets75%
$0.05↓#206540.2413.9 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Dusk Feaster75%
$0.09↓#29635↓0.4010.1 years↑
"This spell costs less to cast if there are four or more card types among cards in your graveyard."
less to cast if there are four or more card types among cards in your graveyard."
Jeskai Shrinekeeper75%
$0.22↓#13623↑0.18↓1.4 years↓
"Flying, haste"
+1 more matching line
Bred for the Hunt74%
$0.18↓#2662↑0.14↓13.3 years↑
"Whenever a creature you control with a +1/+1 counter on it deals combat damage to a player, you may draw a card."
Neurok Commando74%
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"Whenever this creature deals combat damage to a player, you may draw a card."
Mindwrack Demon74%
$0.33↓#196630.07↓10.5 years↑
"Flying, trample"
Oakhame Adversary74%
$0.18↓#6314↑0.11↓6.9 years↑
"Whenever this creature deals combat damage to a player, draw a card."
Falkenrath Marauders74%
$0.26↓#160870.20↓14.9 years↑
"Whenever this creature deals combat damage to a player, put two +1/+1 counters on it."
Heirs of Stromkirk74%
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"Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."