Vampire Lacerator 
Creature — Vampire Warrior
At the beginning of your upkeep, you lose 1 life unless an opponent has 10 or less life.
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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.
Scourge of Numai 92%
$0.27#28809
"At the beginning of your upkeep, you lose 2 life if you don't control an Ogre."
Mindwrack Demon 92%
$0.38#19202
"At the beginning of your upkeep, you lose 4 life unless there are four or more card types among cards in your graveyard."
Reaver Drone 90%
$0.05#28082
"At the beginning of your upkeep, you lose 1 life unless you control another colorless creature."
The One Ring 89%
$101.85#90
"At the beginning of your upkeep, you lose 1 life for each burden counter on this card."
Invasion of Fiora // Marchesa, Resolute Monarch 89%
$0.60#6219
"At the beginning of your upkeep, if you haven't been dealt combat damage since your last turn, you draw a card and you lose 1 life."
Eye of Vecna 86%
$0.40#6888
"At the beginning of your upkeep, you may pay {2}. If you do, you draw a card and you lose 2 life."
Quest for the Nihil Stone 84%
$1.52#10315
"At the beginning of each opponent's upkeep, if that player has no cards in hand and this enchantment has two or more quest counters on it, you may have that player lose 5 life."
Bitterblossom 84%
$34.57#611
"At the beginning of your upkeep, you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying."