Dark Dabbling 

Instant
Regenerate target creature. Draw a card. (The next time the creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, also regenerate each other creature you control.
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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.
Heal the Scars 99%
$0.19#24239
"Regenerate target creature. You gain life equal to that creature's toughness."
Debt of Loyalty 98%
$14.41#16414
"Regenerate target creature. You gain control of that creature if it regenerates this way."
Gaze of the Gorgon 97%
$0.14#23971
"Regenerate target creature. At this turn's next end of combat, destroy all creatures that blocked or were blocked by it this turn."