Enlightened Confidant 

Creature — Kor Cleric
$7.69 #12778 0.16 0.0 years
Lifelink
At the beginning of your end step, if you gained life this turn, surveil 1. If you put a card with mana value less than or equal to the amount of life you gained this turn into your graveyard this way, put that card into your hand.
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Cards similar to Enlightened Confidant 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.
Starlit Soothsayer83%
$0.18↓#113560.00↓2.2 years↑
"At the beginning of your end step, if you gained or lost life this turn, surveil 1."
Vanguard Seraph80%
$0.17↓#104960.101.9 years↑
"Whenever you gain life for the first time each turn, surveil 1."
MACH-1, Swooping Scoundrel78%
$0.26↓#25846↓0.27↑0.3 years
"When this card enters and whenever you gain life, surveil 1. This ability triggers only once each turn."