Infinite Hourglass {4}
Artifact
At the beginning of your upkeep, put a time counter on this artifact.
All creatures get +1/+0 for each time counter on this artifact.
{3}: Remove a time counter from this artifact. Any player may activate this ability but only during any upkeep step.
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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.
Midnight Clock 91%
$0.67#619
"At the beginning of each upkeep, put an hour counter on this artifact."
Mindsplice Apparatus 82%
$1.02#2797
"At the beginning of your upkeep, put an oil counter on this artifact."
+1 more matching line
Barrin's Codex 81%
$0.47#22924
"At the beginning of your upkeep, you may put a page counter on this artifact."