Nemesis of Mortals 


Creature — Snake
This spell costs {1} less to cast for each creature card in your graveyard.
{7}{G}{G}: Monstrosity 5. This ability costs {1} less to activate for each creature card in your graveyard. (If this creature isn't monstrous, put five +1/+1 counters on it and it becomes monstrous.)
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Cards that do something similar 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.
Maester Seymour 85%
$0.38#3958
"{3}{G}{G}: Monstrosity X, where X is the number of counters among creatures you control."
Overwhelming Remorse 100%
$0.21#7044
"This spell costs {1} less to cast for each creature card in your graveyard."
Writhing Necromass 100%
$0.18#15987
"This spell costs {1} less to cast for each creature card in your graveyard."
Cyan, Vengeful Samurai 100%
$0.21#10607
"This spell costs {1} less to cast for each creature card in your graveyard."
Ghoultree 100%
$0.28#10661
"This spell costs {1} less to cast for each creature card in your graveyard."
Karador, Ghost Chieftain 100%
$0.35#10384
"This spell costs {1} less to cast for each creature card in your graveyard."
Hollow Marauder 100%
$0.13#11312
"This spell costs {1} less to cast for each creature card in your graveyard."
Molderhulk 100%
$0.24#14615
"This spell costs {1} less to cast for each creature card in your graveyard."
The Cauldron of Eternity 93%
$1.37#9119
"This spell costs {2} less to cast for each creature card in your graveyard."
Emrakul, the Promised End 81%
$20.28#1854
"This spell costs {1} less to cast for each card type among cards in your graveyard."