Eris, Roar of the Storm 
Legendary Creature — Elemental Warlock
$4.42 #6458 0.10 2.4 years
This spell costs 
less to cast for each different mana value among instant and sorcery cards in your graveyard.
less to cast for each different mana value among instant and sorcery cards in your graveyard.Flying, prowess
Whenever you cast your second spell each turn, create a 4/4 red Dragon Elemental creature token with flying and prowess.
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Cards similar to Eris, Roar of the Storm 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.
Clarion Spirit90%
$0.20↓#70490.055.6 years↑
"Whenever you cast your second spell each turn, create a 1/1 white Spirit creature token with flying."
Station Monitor85%
$0.17↓#16326↓0.011.1 years↓
"Whenever you cast your second spell each turn, create a 1/1 colorless Drone artifact creature token with flying and "This token can block only creatures with flying.""
Wingblade Disciple82%
$0.26↓#13053↓0.161.4 years
"Whenever you cast your second spell each turn, create a 1/1 white Bird creature token with flying."
Aligned Heart80%
$0.29↓#52500.131.4 years
"Whenever you cast your second spell each turn, put a rally counter on this enchantment. Then create a 1/1 white Monk creature token with prowess for each rally counter on it."
Mercurial Geists80%
$0.04↓#25774↓0.25↑10.1 years↑
"Flying"
Aven Wind Mage80%
$0.08↓#23016↓0.31↑8.1 years↑
"Flying"
Cori-Steel Cutter79%
$4.65↑#4261↑0.66↑1.4 years
"Whenever you cast your second spell each turn, create a 1/1 white Monk creature token with prowess. You may attach this Equipment to it."
Stormwing Entity79%
$0.26↓#18342↓0.43↑6.2 years↑
"This spell costs less to cast if you've cast an instant or sorcery spell this turn."
less to cast if you've cast an instant or sorcery spell this turn."
Monica Rambeau // Photon, Living Light78%
$1.74↓#13848↓0.00↓0.2 years↓
"Flying, prowess"
+1 more matching line
Skywise Teachings78%
$0.13↓#21634↓0.38↑11.4 years↑
"Whenever you cast a noncreature spell, you may pay 
. If you do, create a 2/2 blue Djinn Monk creature token with flying."
. If you do, create a 2/2 blue Djinn Monk creature token with flying."
Whispering Wizard78%
$0.21↓#18162↓0.30↑4.8 years↑
"Whenever you cast a noncreature spell, create a 1/1 white Spirit creature token with flying. This ability triggers only once each turn."
Pteramander78%
$0.21↓#16045↓0.00↓7.6 years↑
"Flying"
+1 more matching line
Bedlam Reveler77%
$0.19↓#13889↓0.33↑10.1 years↑
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
Shark Typhoon76%
$1.83↓#1244↑0.35↑6.4 years↑
"Whenever you cast a noncreature spell, create an X/X blue Shark creature token with flying, where X is that spell's mana value."
Monastery Mentor76%
$0.80↓#1561↑0.37↑11.6 years↑
"Whenever you cast a noncreature spell, create a 1/1 white Monk creature token with prowess."
Cryptic Serpent76%
$0.70↓#17474↓0.31↑9.4 years↑
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
Prescient Chimera74%
$0.06↓#22689↓0.1212.9 years↑
"Flying"
Eddymurk Crab74%
$0.73↓#12806↓0.25↑2.1 years
"This spell costs less to cast for each instant and sorcery card in your graveyard."
less to cast for each instant and sorcery card in your graveyard."
Kykar, Wind's Fury74%
$0.43↓#3018↑0.57↑7.2 years↑
"Whenever you cast a noncreature spell, create a 1/1 white Spirit creature token with flying."
Fable of Wolf and Owl74%
$7.12↑#17333↓0.50↑18.1 years↑
"Whenever you cast a blue spell, you may create a 1/1 blue Bird creature token with flying."