Zephyr Singer 
Creature — Siren Pirate
$0.24 #10107 0.12 3.4 years
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 
or one mana of that creature's color.)
or one mana of that creature's color.)Flying, vigilance
When this creature enters, put a flying counter on each creature that convoked it.
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Cards similar to Zephyr Singer 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.
Lofty Dreams95%
$0.16↓#19829↓0.00↓0.6 years↓
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Astral Wingspan95%
$0.21↓#15191↓0.093.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Thunderhead Squadron94%
$0.05↓#27018↓0.64↑3.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Meeting of Minds92%
$0.17↓#5746↑0.33↑3.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Merrow Skyswimmer89%
$0.13↓#21103↓0.00↓0.6 years↓
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Will-Forged Golem88%
$0.07↓#26050↓0.27↑12.1 years↑
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Halo Hopper88%
$0.25↑#17552↓0.00↓3.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Transcendent Message88%
$0.36↑#6218↑0.153.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Referee Squad88%
$0.09↓#19170↓0.28↑3.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Sprout Swarm86%
$4.74↑#5607↑0.55↑19.3 years↑
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Wicked Slumber86%
$0.11↓#15353↓0.063.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Harmonized Crescendo86%
$0.49↑#2873↑0.00↓0.6 years↓
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Interdisciplinary Mascot86%
$0.34↑#15051↓0.47↑3.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Unexpected Assistance86%
$0.21↓#113300.00↓0.6 years↓
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Disruptor of Currents85%
$0.27↑#13599↓0.00↓0.6 years↓
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Temporal Cleansing85%
$0.14↓#12751↓0.133.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Shivan Branch-Burner85%
$0.15↓#19265↓0.183.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Conclave Equenaut85%
$0.07↓#28156↓0.25↑20.9 years↑
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Artistic Refusal85%
$0.17↓#7315↑0.24↑3.4 years
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."
Flight of Equenauts85%
$0.14↓#24348↓0.64↑7.9 years↑
"Convoke Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color."
or one mana of that creature's color."