Fishliver Oil 
Enchantment — Aura
$0.21 #17521 0.05 32.7 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.
One With the Wind85%
$0.07↓#176930.16↑8.9 years↓
"Enchant creature"
Swashbuckling84%
$0.14↓#22741↓0.28↑8.9 years↓
"Enchant creature"
Goblin War Paint84%
$0.07↓#179240.22↑16.9 years↓
"Enchant creature"
Primal Frenzy84%
$0.16↓#23325↓0.33↑24.9 years↓
"Enchant creature"
Imposing Visage84%
$0.15↓#24484↓0.43↑31.3 years↓
"Enchant creature"
Candlelight Vigil84%
$0.12↓#192020.007.9 years↓
"Enchant creature"
Vigilance84%
$0.14↓#24254↓0.22↑21.9 years↓
"Enchant creature"
Messenger's Speed82%
$0.18↓#13210↑0.21↑12.9 years↓
"Enchant creature"
Mythic Proportions82%
$0.54↑#22930↓0.38↑23.9 years↓
"Enchant creature"
Mark of the Vampire82%
$0.12↓#154480.0014.1 years↓
"Enchant creature"
Fear82%
$0.04↓#160970.32↑33.1 years
"Enchant creature"
Spirit Mantle80%
$0.37↑#1704↑0.37↑15.1 years↓
"Enchant creature"
Holy Mantle80%
$0.30↑#8757↑0.33↑13.6 years↓
"Enchant creature"
Red Ward80%
$0.16↓#24632↓0.56↑33.1 years
"Enchant creature"
Green Ward80%
$0.22↑#24838↓0.0033.1 years
"Enchant creature"
Unflinching Courage80%
$0.13↓#6653↑0.0713.3 years↓
"Enchant creature"
Diplomatic Immunity80%
$2.28↑#6285↑0.50↑26.9 years↓
"Enchant creature"
Glasswing Grace // Age-Graced Chapel80%
$0.34↑#2906↑0.112.2 years↓
"Enchant creature"
Mammoth Umbra80%
$0.24↑#12595↑0.0016.4 years↓
"Enchant creature"
Burrowing79%
$0.13↓#22385↓0.27↑33.1 years
"Enchanted creature has mountainwalk."
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