Fishliver Oil 
Enchantment — Aura
$0.22 #17790 0.53 32.8 years
Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature has islandwalk. (It can't be blocked as long as defending player controls an Island.)
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Cards similar to Fishliver Oil 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.
Arcane Flight85%
$0.13↓#13343↑0.23↓8.5 years↓
"Enchant creature"
Primal Frenzy84%
$0.15↓#23554↓0.00↓25.1 years↓
"Enchant creature"
Furious Strength84%
$0.19↓#25624↓0.19↓0.3 years↓
"Enchant creature"
Vigilance84%
$0.16↓#24459↓0.00↓22.1 years↓
"Enchant creature"
Imposing Visage84%
$0.16↓#24768↓0.00↓31.4 years↓
"Enchant creature"
Marked by Honor84%
$0.05↓#22923↓0.00↓12.3 years↓
"Enchant creature"
Madcap Skills84%
$0.15↓#13013↑0.06↓13.7 years↓
"Enchant creature"
Lightning Talons84%
$0.05↓#21794↓0.00↓18.0 years↓
"Enchant creature"
Eel Umbra83%
$0.14↓#5789↑0.05↓16.5 years↓
"Enchant creature"
Aspect of Gorgon83%
$0.26↑#154850.00↓12.5 years↓
"Enchant creature"
Messenger's Speed82%
$0.16↓#13501↑0.27↓13.1 years↓
"Enchant creature"
Spiteful Motives82%
$0.05↓#25879↓0.00↓10.5 years↓
"Enchant creature"
Mantle of Webs82%
$0.22#24338↓0.00↓11.3 years↓
"Enchant creature"
Wings of Aesthir82%
$0.25↑#29831↓0.31↓31.4 years↓
"Enchant creature"
Boar Umbra82%
$0.26↑#7988↑0.06↓16.5 years↓
"Enchant creature"
Drake Umbra81%
$0.19↓#150770.19↓16.5 years↓
"Enchant creature"
Spider Umbra80%
$0.33↑#5940↑0.35↓16.5 years↓
"Enchant creature"
Mammoth Umbra80%
$0.24↑#12936↑0.18↓16.5 years↓
"Enchant creature"
Zephid's Embrace80%
$0.17↓#176180.00↓28.0 years↓
"Enchant creature"
Epic Proportions80%
$0.26↑#182980.17↓19.0 years↓
"Enchant creature"