Livaan, Cultist of Tiamat 
Legendary Creature — Dragon Shaman
$0.18 #9377 0.00 4.4 years
Whenever you cast a noncreature spell, target creature gets +X/+0 until end of turn, where X is that spell's mana value.
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Cards similar to Livaan, Cultist of Tiamat 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.
Frenzied Devils86%
$0.07↓#25894↓0.12↑4.9 years
"Whenever you cast a noncreature spell, this creature gets +2/+2 until end of turn."
Cunning Breezedancer86%
$0.18#25038↓0.0511.6 years↑
"Whenever you cast a noncreature spell, this creature gets +2/+2 until end of turn."
Sky Theater Strix86%
$0.05↓#25872↓0.12↑7.5 years↑
"Whenever you cast a noncreature spell, this creature gets +1/+0 until end of turn."
Crackling Cyclops86%
$0.14↓#14802↓0.051.9 years↓
"Whenever you cast a noncreature spell, this creature gets +3/+0 until end of turn."
Tempest Angler82%
$0.19↑#75530.002.2 years↓
"Whenever you cast a noncreature spell, put a +1/+1 counter on this creature."
Deeproot Champion82%
$0.29↑#20334↓0.18↑9.1 years↑
"Whenever you cast a noncreature spell, put a +1/+1 counter on this creature."
Pyroceratops82%
$0.21↑#18678↓0.006.5 years↑
"Whenever you cast a noncreature spell, put a +1/+1 counter on this creature."
Chandra's Emberling82%
$0.17↓#25096↓0.10↑0.0 years↓
"Whenever you cast a noncreature spell, put a +1/+1 counter on this creature."
Sprite Dragon82%
$0.38↑#6341↑0.066.5 years↑
"Whenever you cast a noncreature spell, put a +1/+1 counter on this creature."
Slickshot Show-Off81%
$5.75↑#94320.29↑2.5 years↓
"Whenever you cast a noncreature spell, this creature gets +2/+0 until end of turn."
Moku, Meandering Drummer80%
$0.18#23364↓0.13↑0.9 years↓
"Whenever you cast a noncreature spell, you may pay 
. If you do, this card gets +2/+1 and creatures you control gain haste until end of turn."
. If you do, this card gets +2/+1 and creatures you control gain haste until end of turn."
Manaplasm80%
$0.20↑#16463↓0.0018.0 years↑
"Whenever you cast a spell, this creature gets +X/+X until end of turn, where X is that spell's mana value."
Winter, Team Player78%
$0.15↓#25266↓0.19↑0.0 years↓
"Whenever you cast a noncreature spell, creatures you control get +1/+0 until end of turn."
Krile Baldesion78%
$0.22↑#7055↑0.001.4 years↓
"Whenever you cast a noncreature spell, you may return target creature card with mana value equal to that spell's mana value from your graveyard to your hand. Do this only once each turn."
Black Bolt, Inhuman King78%
$0.23↑#20452↓0.23↑0.3 years↓
"Whenever you cast a noncreature spell, this card gets +2/+2 until end of turn."
Erratic Cyclops78%
$0.15↓#18693↓0.19↑8.0 years↑
"Whenever you cast an instant or sorcery spell, this creature gets +X/+0 until end of turn, where X is that spell's mana value."
TVA Bureaucrat78%
$0.26↑#30161↓0.16↑0.3 years↓
"Whenever you cast a noncreature spell, this creature gets +1/+0 until end of turn and can't be blocked this turn."
Elusive Spellfist78%
$0.12↓#19401↓0.0511.6 years↑
"Whenever you cast a noncreature spell, this creature gets +1/+0 until end of turn and can't be blocked this turn."
Hraesvelgr of the First Brood76%
$0.27↑#77080.15↑1.4 years↓
"When Hraesvelgr enters and whenever you cast a noncreature spell, target creature gets +1/+0 until end of turn and can't be blocked this turn."
Spellgorger Weird76%
$0.09↓#16378↓0.067.5 years↑
"Whenever you cast a noncreature spell, put a +1/+1 counter on this creature."