Riddles in the Dark 

Instant
Look at the top four cards of your library and separate them into a face-down pile and a face-up pile. An opponent chooses one of the piles. Put that pile into your hand and the other into your graveyard.
click a line to search just that ability, click more to combine them
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.