Starseer Mentor 
Creature — Bat Warlock
$0.25 #10854 0.20 2.1 years
Flying, vigilance
At the beginning of your end step, if you gained or lost life this turn, target opponent loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card.
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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.
Perforating Artist87%
$0.27↑#6646↑0.271.8 years
"At the beginning of your end step, if you attacked this turn, each opponent loses 3 life unless that player sacrifices a nonland permanent of their choice or discards a card."
Torment of Hailfire84%
$36.84↑#618↑1.62↑9.1 years↑
"Repeat the following process X times. Each opponent loses 3 life unless that player sacrifices a nonland permanent of their choice or discards a card."
Thornplate Intimidator82%
$0.12↓#111790.262.1 years
"When this creature enters, target opponent loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card."
Nicol Bolas, the Deceiver82%
$5.78↑#127970.59↑9.1 years↑
"+3: Each opponent loses 3 life unless that player sacrifices a nonland permanent of their choice or discards a card."
Torment of Venom82%
$0.19↓#18279↓0.149.1 years↑
"Put three -1/-1 counters on target creature. Its controller loses 3 life unless they sacrifice another nonland permanent of their choice or discard a card."
Torment of Scarabs80%
$0.31↑#8678↑0.07↓9.1 years↑
"At the beginning of enchanted player's upkeep, that player loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card."
Tergrid, God of Fright // Tergrid's Lantern80%
$18.45↑#1560↑2.80↑5.6 years↑
"
: Target player loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card."
: Target player loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card."
Starlit Soothsayer79%
$0.19↓#109660.06↓2.1 years
"Flying"
Remorseless Punishment75%
$0.12↓#22269↓0.40↑10.6 years↑
"Target opponent loses 5 life unless that player discards two cards or sacrifices a creature or planeswalker of their choice. Repeat this process once."
Rottenmouth Viper74%
$5.87↑#2904↑0.73↑2.1 years
"Whenever this creature enters or attacks, put a blight counter on it. Then for each blight counter on it, each opponent loses 4 life unless that player sacrifices a nonland permanent of their choice or discards a card."
Forbidden Ritual74%
$1.10↑#25087↓0.40↑29.6 years↑
"Sacrifice a nontoken permanent. If you do, target opponent loses 2 life unless that player sacrifices a permanent of their choice or discards a card. You may repeat this process any number of times."
Lunar Convocation74%
$0.66↑#3138↑0.142.1 years
"At the beginning of your end step, if you gained life this turn, each opponent loses 1 life."
Rakdos, Patron of Chaos73%
$4.04↑#2686↑0.48↑2.6 years
"At the beginning of your end step, target opponent may sacrifice two nonland, nontoken permanents of their choice. If they don't, you draw two cards."
Braids's Frightful Return72%
$0.22↓#116650.41↑4.0 years↑
"Target opponent may sacrifice a nonland, nontoken permanent of their choice. If they don't, they lose 2 life and you draw a card."
Courier Bat72%
$0.20↓#120250.00↓4.8 years↑
"Flying"
Zoyowa Lava-Tongue70%
$0.20↓#7671↑0.63↑2.8 years
"At the beginning of your end step, if you descended this turn, each opponent may discard a card or sacrifice a permanent of their choice. Zoyowa deals 3 damage to each opponent who didn't."
Foolish Fate70%
$0.12↓#16392↓0.00↓0.4 years↓
"If you gained life this turn, that creature's controller loses 3 life."