Possessed Portal 
Artifact
$2.75 #17237 1.56 22.3 years
If a player would draw a card, that player skips that draw instead.
At the beginning of each end step, each player sacrifices a permanent of their choice unless they discard a card.
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Cards similar to Possessed Portal 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.
World Queller86%
$0.38↓#21032↓0.75↓16.9 years↓
"At the beginning of your upkeep, you may choose a card type. If you do, each player sacrifices a permanent of their choice of that type."
Smokestack83%
$1.04↓#8537↑2.08↑27.9 years↑
"At the beginning of each player's upkeep, that player sacrifices a permanent of their choice for each soot counter on this artifact."
Crack the Earth82%
$0.25↓#188940.21↓21.6 years
"Each player sacrifices a permanent of their choice."
Earth-Cult Elemental80%
$0.23↓#7768↑0.18↓5.1 years↓
"Each player sacrifices a permanent of their choice."
Breathstealer's Crypt79%
$11.13↑#151901.07↓29.6 years↑
"If a player would draw a card, instead they draw a card and reveal it. If it's a creature card, that player discards it unless they pay 3 life."
Forbidden Ritual78%
$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."
Greater Harvester76%
$1.84↓#13299↑0.61↓22.6 years
"At the beginning of your upkeep, sacrifice a permanent."
Balancing Act74%
$1.74↓#20890↓1.04↓24.9 years↑
"Each player chooses a number of permanents they control equal to the number of permanents controlled by the player who controls the fewest, then sacrifices the rest. Each player discards cards the same way."
Silverclad Ferocidons74%
$0.88↓#5352↑0.63↓8.6 years↓
"Whenever this creature is dealt damage, each opponent sacrifices a permanent of their choice."
Dispersing Orb74%
$0.22↓#28349↓0.22↓23.9 years↑
"
, Sacrifice a permanent: Return target permanent to its owner's hand."
, Sacrifice a permanent: Return target permanent to its owner's hand."
Notion Thief73%
$1.63↓#1191↑1.96↑13.3 years↓
"If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card."
Razia's Purification73%
$0.98↓#21135↓1.5920.9 years↓
"Each player chooses three permanents they control, then sacrifices the rest."
Zoyowa Lava-Tongue72%
$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."
Uba Mask72%
$9.49↑#9289↑0.92↓21.9 years
"If a player would draw a card, that player exiles that card face up instead."
Chains of Mephistopheles72%
$1183.06↑#11012↑1.6132.3 years↑
"If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card."
Necrogen Mists72%
$11.47↑#6311↑1.13↓22.9 years
"At the beginning of each player's upkeep, that player discards a card."
Pillar Tombs of Aku71%
$1.04↓#29646↓0.12↓29.6 years↑
"At the beginning of each player's upkeep, that player may sacrifice a creature of their choice. If that player doesn't, they lose 5 life and you sacrifice this enchantment."
Molder Slug70%
$0.33↓#191650.53↓22.9 years
"At the beginning of each player's upkeep, that player sacrifices an artifact of their choice."
Pox Plague70%
$0.29↓#10524↑0.00↓0.4 years↓
"Each player loses half their life, then discards half the cards in their hand, then sacrifices half the permanents they control of their choice. Round down each time."
Plagiarize70%
$0.39↓#200750.73↓24.6 years↑
"Until end of turn, if target player would draw a card, instead that player skips that draw and you draw a card."