Luxa River Shrine 
Artifact
{1}, {T}: You gain 1 life. Put a brick counter on this artifact.
{T}: You gain 2 life. Activate only if there are three or more brick counters on this artifact.
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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.
Potioner's Trove 100%
$0.12#13031
"{T}: You gain 2 life. Activate only if you've cast an instant or sorcery spell this turn."
Chalice of Life // Chalice of Death 95%
$0.43#8146
"{T}: You gain 1 life. Then if you have at least 10 life more than your starting life total, transform this artifact."
Temple Elder 95%
$0.22#31372
"{T}: You gain 1 life. Activate only during your turn, before attackers are declared."
Shu Farmer 95%
$3.20#29545
"{T}: You gain 1 life. Activate only during your turn, before attackers are declared."
Mine Worker 94%
$0.13#18334
"{T}: You gain 1 life. If you control creatures named Power Plant Worker and Tower Worker, you gain 3 life instead."
Elixir of Immortality 91%
$0.86#1389
"{2}, {T}: You gain 5 life. Shuffle this artifact and your graveyard into their owner's library."