Overwhelm 
Sorcery
$0.05 #20463 0.00 21.0 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.)Creatures you control get +3/+3 until end of turn.
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Cards similar to Overwhelm 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.
Arboretum Elemental98%
$0.10↑#226750.22↑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."
Siege Wurm98%
$0.05#192740.18↑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."
Living Totem98%
$0.05#27026↓0.0012.1 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."
Feral Incarnation97%
$0.09↑#234460.0012.1 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."
Scatter the Seeds97%
$0.14↑#8687↑0.22↑21.0 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."
Root-Kin Ally96%
$0.03↓#30002↓0.0020.9 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."
Rosemane Centaur96%
$0.05#29529↓0.53↑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."
Worldsoul Colossus96%
$0.08↑#226810.29↑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."
Will-Forged Golem96%
$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 Hopper96%
$0.25↑#175520.003.4 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."
Gather Courage96%
$0.06↑#209210.0020.9 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."
Kavu Primarch95%
$0.06↑#233380.40↑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."
Impervious Greatwurm95%
$3.97↑#4416↑0.35↑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."
Guardian of Vitu-Ghazi95%
$0.17↑#29720↓0.38↑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."
Sprout Swarm94%
$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."
March of the Multitudes94%
$0.60↑#3020↑0.19↑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."
Pack's Favor94%
$0.08↑#26539↓0.22↑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."
Sundering Vitae94%
$0.11↑#173860.0020.9 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."
Ancient Imperiosaur93%
$0.36↑#8216↑0.22↑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."
Ramosian Rally92%
$0.23↑#26793↓0.25↑26.9 years↑
"Creatures you control get +1/+1 until end of turn."