Retro-Mutation {2}{U}
Enchantment — Aura
Flash
Enchant creature
Enchanted creature is a Turtle with base power and toughness 0/1. It can't attack and loses all abilities. (It also loses all other creature types.)
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Cards that do something similar 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.
Fog on the Barrow-Downs 80%
$0.12#17584
"Enchanted creature is a Spirit and can't attack or block."
+1 more matching line