Secret Invasion {1}{U}{U}
Enchantment — Aura
Enchant creature you control
When this Aura enters, exile up to one target creature other than enchanted creature until this Aura leaves the battlefield. Enchanted creature becomes a copy of that creature until this Aura leaves the battlefield.
Enchanted creature has ward {2}.
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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.