Vampiric Rites 
Enchantment
{1}{B}, Sacrifice a creature: You gain 1 life and draw a card.
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.
Gibbering Barricade 99%
$0.13#19459
"{2}{B}, Sacrifice a creature: You gain 1 life and draw a card."
Witch's Cauldron 93%
$0.16#10273
"{1}{B}, {T}, Sacrifice a creature: You gain 1 life and draw a card."