Hullbreacher {2}{U}
Creature — Merfolk Pirate
Flash
If an opponent would draw a card except the first one they draw in each of their draw steps, instead you create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
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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.
Tataru Taru 81%
$8.00#1294
"Whenever an opponent draws a card, if it isn't that player's turn, create a tapped Treasure token. This ability triggers only once each turn."
Smothering Tithe 81%
$63.54#63
"Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token."